Timing parameter management for bandwidth part switching

ABSTRACT

Bandwidth part (BWP) switching may benefit a wireless communications system. Such BWP switching may include indication of one or more timing parameters used for time domain resource allocation. For example, the timing parameters may be indicated based on an index to a look-up table (e.g., a bit field in a control transmission). In some cases, one or more tables may be configured for a given BWP, and different tables may contain a different number of rows. The size of the bit field indexing the table may in turn depend on the number of rows. When switching from a first BWP to a second BWP, the size of the bit field may be based on the table of the first BWP, but the bit field may index the table of the second BWP. Techniques supporting improved timing parameter management during BWP switching are discussed herein.

CROSS REFERENCE

The present application for patent claims the benefit of U.S.Provisional Patent Application No. 62/653,510 by ANG, et al., entitled“Timing Parameter Management For Bandwidth Part Switching,” filed Apr.5, 2018, assigned to the assignee hereof, and expressly incorporated byreference herein in its entirety.

BACKGROUND

The following relates generally to wireless communication, and morespecifically to timing parameter management for bandwidth partswitching.

Wireless communications systems are widely deployed to provide varioustypes of communication content such as voice, video, packet data,messaging, broadcast, and so on. These systems may be capable ofsupporting communication with multiple users by sharing the availablesystem resources (e.g., time, frequency, and power). Examples of suchmultiple-access systems include fourth generation (4G) systems such asLong Term Evolution (LTE) systems, LTE-Advanced (LTE-A) systems, orLTE-A Pro systems, and fifth generation (5G) systems which may bereferred to as New Radio (NR) systems. These systems may employtechnologies such as code division multiple access (CDMA), time divisionmultiple access (TDMA), frequency division multiple access (FDMA),orthogonal frequency division multiple access (OFDMA), or discreteFourier transform-spread-OFDM (DFT-s-OFDM). A wireless multiple-accesscommunications system may include a number of base stations or networkaccess nodes, each simultaneously supporting communication for multiplecommunication devices, which may be otherwise known as user equipment(UE).

In some wireless communications systems, wireless devices may operatewithin different portions of a channel or carrier. For example, a UE mayoperate in one or more bandwidth parts (BWPs) of a channel used forwireless communications. In such cases, the UE may be capable ofswitching between different BWPs, for example, to conserve energy bytuning a radio to a smaller BWP (e.g., as compared to other BWPs).Switching between these respective BWPs may be controlled throughdownlink signaling, such as downlink control information (DCI), whichmay enable various schemes for resource assignments and for triggeringof BWP switching. As a result, techniques that support efficient BWPswitching may be desired.

SUMMARY

The described techniques relate to improved methods, systems, devices,and apparatuses that support timing parameter management for bandwidthpart switching. Generally, the described techniques provideconsiderations for time-domain resource allocation associated withbandwidth part (BWP) switching. For example, a device (e.g., a userequipment (UE)) may be configured to support one or more BWPs (e.g., viaradio resource control (RRC) signaling). A BWP may, for example, allowthe UE to operate within a smaller frequency range (e.g., compared to acomponent carrier bandwidth). In some cases, a UE may be configured withmultiple BWPs with different frequency locations, bandwidths,numerologies (e.g., communication parameters), combinations thereof,etc. Because of the differences between the configured BWPs, ambiguitymay arise during or following a BWP switch. For example, a UE may betriggered (e.g., via downlink control information (DCI) received from abase station) to switch from a first BWP to a second BWP. In some cases,the DCI indicating the switch may be formatted based at least in part onthe first BWP, which may constrain its flexibility when applied to thesecond BWP, meaning, for example, when a format of the DCI correspondingto the first BWP is used to indicate a parameter value associated withthe second BWP.

By way of example, the second BWP may be associated with a table (e.g.,a timing parameter table) that is larger than a corresponding tableassociated with the first BWP. In some cases, the DCI indicating theswitch may contain a bit-field that is sized according to the first BWPtable. For example, if the first BWP table contains four rows, thebit-field may be a two-bit long field for indexing the rows. However, ifthe second BWP table differs in size from the first BWP table,difficulties in indexing rows of the second BWP table may arise. Forexample, if the second BWP table contains eight rows, only the firstfour may be addressable by the two-bit long field in the DCI.Considerations for efficient BWP switching are described herein. Suchconsiderations include layouts of the BWP tables (e.g., the timingparameter tables), DCI formats, and timing considerations, among others.

A method of wireless communication is described. The method may includeidentifying a set of timing parameter tables that each define one ormore potential values for a timing parameter associated with a timingbetween receipt, from a base station, of DCI and a subsequentcommunication with the base station according to the DCI, the set oftiming parameter tables including at least a first timing parametertable associated with a first BWP and a second timing parameter tableassociated with a second BWP, receiving, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indexing at least a subset ofthe second timing parameter table, where a size of the resourceallocation bit field is based on a configuration of the first BWP,identifying a value for the timing parameter based on the second timingparameter table and the size of the resource allocation bit field, andcommunicating with the base station over the second BWP in accordancewith the value for the timing parameter.

An apparatus for wireless communication is described. The apparatus mayinclude a processor, memory coupled with the processor, and instructionsstored in the memory. The instructions may be executable by theprocessor to cause the apparatus to identifying a set of timingparameter tables that each define one or more potential values for atiming parameter associated with a timing between receipt, from a basestation, of DCI and a subsequent communication with the base stationaccording to the DCI, the set of timing parameter tables including atleast a first timing parameter table associated with a first BWP and asecond timing parameter table associated with a second BWP, receiving,over the first BWP, a DCI transmission that activates the second BWP,the DCI transmission including a resource allocation bit field indexingat least a subset of the second timing parameter table, where a size ofthe resource allocation bit field is based on a configuration of thefirst BWP, identifying a value for the timing parameter based on thesecond timing parameter table and the size of the resource allocationbit field, and communicating with the base station over the second BWPin accordance with the value for the timing parameter.

Another apparatus for wireless communication is described. The apparatusmay include identifying a set of timing parameter tables that eachdefine one or more potential values for a timing parameter associatedwith a timing between receipt, from a base station, of DCI and asubsequent communication with the base station according to the DCI, theset of timing parameter tables including at least a first timingparameter table associated with a first BWP and a second timingparameter table associated with a second BWP, receiving, over the firstBWP, a DCI transmission that activates the second BWP, the DCItransmission including a resource allocation bit field indexing at leasta subset of the second timing parameter table, where a size of theresource allocation bit field is based on a configuration of the firstBWP, identifying a value for the timing parameter based on the secondtiming parameter table and the size of the resource allocation bitfield, and communicating with the base station over the second BWP inaccordance with the value for the timing parameter.

A non-transitory computer-readable medium storing code for wirelesscommunication is described. The code may include instructions executableby a processor to identifying a set of timing parameter tables that eachdefine one or more potential values for a timing parameter associatedwith a timing between receipt, from a base station, of DCI and asubsequent communication with the base station according to the DCI, theset of timing parameter tables including at least a first timingparameter table associated with a first BWP and a second timingparameter table associated with a second BWP, receiving, over the firstBWP, a DCI transmission that activates the second BWP, the DCItransmission including a resource allocation bit field indexing at leasta subset of the second timing parameter table, where a size of theresource allocation bit field is based on a configuration of the firstBWP, identifying a value for the timing parameter based on the secondtiming parameter table and the size of the resource allocation bitfield, and communicating with the base station over the second BWP inaccordance with the value for the timing parameter.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first timing parametertable includes a first set of rows and the second timing parameter tableincludes a second set of rows, each row of the first set of rows and thesecond set of rows indicating a potential value for the timingparameter, and where the size of the resource allocation bit field maybe based on a number of rows in the first set of rows.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first set of rows mayinclude operations, features, means, or instructions for identifying asubset of bits in the resource allocation bit field, the subset of bitsindexing a row of the second set of rows and determining the value forthe timing parameter based on the indexed row of the second set of rows.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first set of rows mayinclude operations, features, means, or instructions for identifying asubset of the second set of rows that may be addressable by the resourceallocation bit field, identifying a row of the subset of the second setof rows indexed by the resource allocation bit field and determining thevalue for the timing parameter based on the indexed row.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes a lowest-indexed row of the second set of rows, thelowest-indexed row corresponding to a preferred value of the timingparameter for switching to the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes a largest value of the potential values for the timingparameter from the second plurality of rows.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes at least one row corresponding to a preferred value ofthe timing parameter for communicating in the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the preferred value of thetiming parameter includes a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first timing parametertable may be associated with uplink transmissions over the first BWP,the set of timing parameter tables further including a third timingparameter table associated with downlink transmissions over the firstBWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first BWP may have afirst tone spacing and the second BWP may have a second tone spacing,where the potential values for the timing parameter of the first timingparameter table are based on the first tone spacing, and the potentialvalues for the timing parameter of the second timing parameter table arebased on the second tone spacing.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may include operations,features, means, or instructions for adjusting a minimum value of thetiming parameter, based on switching communications from the first BWPto the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, identifying the set of timingparameter tables may include operations, features, means, orinstructions for receiving at least one of the set of timing parametertables from the base station via RRC signaling.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, communicating with the basestation in accordance with the value for the timing parameter mayinclude operations, features, means, or instructions for receiving aPDSCH transmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, communicating with the basestation in accordance with the value for the timing parameter mayinclude operations, features, means, or instructions for transmitting aPUSCH transmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a formatfor the DCI transmission and selecting the second timing parameter tablefrom the set of timing parameter tables based on the format of the DCItransmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the DCI transmission includesa BWP identification field that activates the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first BWP may beassociated with a lower transmission power than the second BWP.

A method of wireless communication is described. The method may includeidentifying a set of timing parameter tables that each define one ormore potential values for a timing parameter associated with a timingbetween transmission, to a UE, of DCI and a subsequent communicationwith the UE according to the DCI, the set of timing parameter tablesincluding at least a first timing parameter table associated with afirst BWP and a second timing parameter table associated with a secondBWP, selecting a value for the timing parameter based on the secondtiming parameter table, transmitting, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indicating the value for thetiming parameter, where a size of the resource allocation bit field isbased on a configuration of the first BWP, and communicating with the UEover the second BWP in accordance with the value for the timingparameter.

An apparatus for wireless communication is described. The apparatus mayinclude a processor, memory coupled with the processor, and instructionsstored in the memory. The instructions may be executable by theprocessor to cause the apparatus to identifying a set of timingparameter tables that each define one or more potential values for atiming parameter associated with a timing between transmission, to a UE,of DCI and a subsequent communication with the UE according to the DCI,the set of timing parameter tables including at least a first timingparameter table associated with a first BWP and a second timingparameter table associated with a second BWP, selecting a value for thetiming parameter based on the second timing parameter table,transmitting, over the first BWP, a DCI transmission that activates thesecond BWP, the DCI transmission including a resource allocation bitfield indicating the value for the timing parameter, where a size of theresource allocation bit field is based on a configuration of the firstBWP, and communicating with the UE over the second BWP in accordancewith the value for the timing parameter.

Another apparatus for wireless communication is described. The apparatusmay include identifying a set of timing parameter tables that eachdefine one or more potential values for a timing parameter associatedwith a timing between transmission, to a UE, of DCI and a subsequentcommunication with the UE according to the DCI, the set of timingparameter tables including at least a first timing parameter tableassociated with a first BWP and a second timing parameter tableassociated with a second BWP, selecting a value for the timing parameterbased on the second timing parameter table, transmitting, over the firstBWP, a DCI transmission that activates the second BWP, the DCItransmission including a resource allocation bit field indicating thevalue for the timing parameter, where a size of the resource allocationbit field is based on a configuration of the first BWP, andcommunicating with the UE over the second BWP in accordance with thevalue for the timing parameter.

A non-transitory computer-readable medium storing code for wirelesscommunication is described. The code may include instructions executableby a processor to identifying a set of timing parameter tables that eachdefine one or more potential values for a timing parameter associatedwith a timing between transmission, to a UE, of DCI and a subsequentcommunication with the UE according to the DCI, the set of timingparameter tables including at least a first timing parameter tableassociated with a first BWP and a second timing parameter tableassociated with a second BWP, selecting a value for the timing parameterbased on the second timing parameter table, transmitting, over the firstBWP, a DCI transmission that activates the second BWP, the DCItransmission including a resource allocation bit field indicating thevalue for the timing parameter, where a size of the resource allocationbit field is based on a configuration of the first BWP, andcommunicating with the UE over the second BWP in accordance with thevalue for the timing parameter.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first timing parametertable includes a first set of rows and the second timing parameter tableincludes a second set of rows, each row of the first set of rows and thesecond set of rows indicating a potential value for the timingparameter, and where the size of the resource allocation bit field maybe based on a number of rows in the first set of rows.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first set of rows mayinclude operations, features, means, or instructions for zero-paddingthe resource allocation bit field.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first set of rows mayinclude operations, features, means, or instructions for identifying asubset of the second set of rows that may be addressable by the resourceallocation bit field and selecting the value for the timing parameterbased on the subset of the second set of rows.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes a lowest-indexed row of the second set of rows, thelowest-indexed row corresponding to a preferred value of the timingparameter for switching to the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes a set of lowest-indexed rows of the second plurality ofrows, the set of lowest-indexed rows corresponding to a set of values ofthe timing parameter, where the values of the timing parameter areordered from the largest value of the timing parameter to the smallestvalue of the timing parameter, for switching to the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the subset of the second setof rows includes at least one row corresponding to a preferred value ofthe timing parameter for communicating in the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the preferred value of thetiming parameter includes a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first timing parametertable may be associated with uplink transmissions over the first BWP,the set of timing parameter tables further including a third timingparameter table associated with downlink transmissions over the firstBWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first BWP may have afirst tone spacing and the second BWP may have a second tone spacing,the potential values for the timing parameter of the first timingparameter table based on the first tone spacing and the potential valuesfor the timing parameter of the second timing parameter table based onthe second tone spacing.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may include operations,features, means, or instructions for adjusting a minimum value of thetiming parameter, based on switching communications from the first BWPto the second BWP.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for transmitting at leastone of the set of timing parameter tables to the UE via RRC signaling.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, communicating with the UE inaccordance with the value for the timing parameter may includeoperations, features, means, or instructions for transmitting a PDSCHtransmission.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, communicating with the UE inaccordance with the value for the timing parameter may includeoperations, features, means, or instructions for receiving a PUSCHtransmission.

Some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein may further includeoperations, features, means, or instructions for identifying a triggerfor switching communications with the UE from the first BWP to thesecond BWP, and identifying a format for the DCI transmission based onthe trigger.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the DCI transmission includesa BWP identification field that activates the second BWP.

In some examples of the method, apparatuses, and non-transitorycomputer-readable medium described herein, the first BWP may beassociated with a lower transmission power than the second BWP.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates an example of a wireless communications system thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure.

FIG. 2 illustrates an example of a wireless communications system thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure.

FIG. 3 illustrates an example of a communications diagram that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure.

FIGS. 4 through 6 illustrate example transmission schemes that supporttiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure.

FIG. 7 illustrates an example of a process flow that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure.

FIGS. 8 and 9 show block diagrams of devices that support timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure.

FIG. 10 shows a block diagram of a device that supports timing parametermanagement for bandwidth part switching in accordance with aspects ofthe present disclosure.

FIG. 11 shows a diagram of a system including a device that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure.

FIGS. 12 and 13 show block diagrams of devices that support timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure.

FIG. 14 shows a block diagram of a device that supports timing parametermanagement for bandwidth part switching in accordance with aspects ofthe present disclosure.

FIG. 15 shows a diagram of a system including a device that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure.

FIGS. 16 and 17 show flowcharts illustrating methods that support timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure.

DETAILED DESCRIPTION

In some wireless communication systems, the size (e.g., bit length) ofone or more downlink control information (DCI) bit fields may be basedon the size (e.g., bandwidth) of an associated bandwidth part (BWP). DCIsignaling may be used to control and facilitate switching between acurrent BWP of a first size and a target BWP of a second size during aBWP switching event. Switching between respective BWPs may be controlledthrough downlink signaling, such as DCI, which may enable variousschemes for resource assignments and for triggering of BWP switching.

In some cases, cross-slot scheduling, as well as cross-BWP scheduling,may help to accommodate latency in switching between the narrow and wideBWPs. For example, DCI signaling may be used to control a switch from anarrow BWP format in a first slot to a wide BWP format in a second slot,or vice versa, where the different BWP formats have different DCI fieldsizes. In some cases, a base station may signal to a user equipment (UE)a transmission delay associated with downlink and uplink transmissions(e.g., a timing parameter). Examples of such timing parameters includek0 values and k2 values. A k0 value may, for example, correspond to adelay between a downlink grant (e.g., a first slot containing DCI) and adownlink data assignment (e.g., a second slot containing a physicaldownlink shared channel (PDSCH) transmission). Similarly, a k2 value maycorrespond to a delay between a downlink grant and an uplink dataassignment (e.g., a second slot containing a physical uplink sharedchannel (PUSCH) transmission). In some examples, k0 and k2 may representa number of slots (e.g., or some other suitable time interval). In somecases, the timing parameter(s) may be signaled via a DCI bit field. Forexample, the DCI bit field may contain an index to a table configured(e.g., via radio resource control (RRC) signaling) for the current BWP.

The size of one or more, or all, DCI bit fields may be determinedaccording to the current BWP. For example, a size of the bit fieldindexing the configured table may be based on a number of rows in thetable. However, during a BWP switch (e.g., from a first BWP having atable with four rows to a second BWP having a table with eight rows),the DCI bit field (e.g., which is based on a configuration of the firstBWP) may only be large enough to index four rows of the second BWPtable. Considerations for timing parameter management for BWP switchingare discussed herein.

Aspects of the disclosure are initially described in the context of awireless communications systems. Aspects of the disclosure are thendescribed in the context of communication diagrams, process flows, andtransmission scheme. Aspects of the disclosure are further illustratedby and described with reference to apparatus diagrams, system diagrams,and flowcharts that relate to timing parameter management for bandwidthpart switching.

FIG. 1 illustrates an example of a wireless communications system 100that supports timing parameter management for bandwidth part switchingin accordance with aspects of the present disclosure. The wirelesscommunications system 100 includes base stations 105, UEs 115, and acore network 130. In some examples, the wireless communications system100 may be a Long Term Evolution (LTE) network, an LTE-Advanced (LTE-A)network, an LTE-A Pro network, or a New Radio (NR) network. In somecases, wireless communications system 100 may support enhanced broadbandcommunications, ultra-reliable (e.g., mission critical) communications,low latency communications, or communications with low-cost andlow-complexity devices.

Base stations 105 may wirelessly communicate with UEs 115 via one ormore base station antennas. Base stations 105 described herein mayinclude or may be referred to by those skilled in the art as a basetransceiver station, a radio base station, an access point, a radiotransceiver, a NodeB, an eNodeB (eNB), a next-generation Node B orgiga-nodeB (either of which may be referred to as a gNB), a Home NodeB,a Home eNodeB, or some other suitable terminology. Wirelesscommunications system 100 may include base stations 105 of differenttypes (e.g., macro or small cell base stations). The UEs 115 describedherein may be able to communicate with various types of base stations105 and network equipment including macro eNBs, small cell eNBs, gNBs,relay base stations, and the like.

Each base station 105 may be associated with a particular geographiccoverage area 110 in which communications with various UEs 115 issupported. Each base station 105 may provide communication coverage fora respective geographic coverage area 110 via communication links 125,and communication links 125 between a base station 105 and a UE 115 mayutilize one or more carriers. Communication links 125 shown in wirelesscommunications system 100 may include uplink transmissions from a UE 115to a base station 105, or downlink transmissions from a base station 105to a UE 115. Downlink transmissions may also be called forward linktransmissions while uplink transmissions may also be called reverse linktransmissions.

The geographic coverage area 110 for a base station 105 may be dividedinto sectors making up only a portion of the geographic coverage area110, and each sector may be associated with a cell. For example, eachbase station 105 may provide communication coverage for a macro cell, asmall cell, a hot spot, or other types of cells, or various combinationsthereof. In some examples, a base station 105 may be movable andtherefore provide communication coverage for a moving geographiccoverage area 110. In some examples, different geographic coverage areas110 associated with different technologies may overlap, and overlappinggeographic coverage areas 110 associated with different technologies maybe supported by the same base station 105 or by different base stations105. The wireless communications system 100 may include, for example, aheterogeneous LTE/LTE-A/LTE-A Pro or NR network in which different typesof base stations 105 provide coverage for various geographic coverageareas 110.

The term “cell” refers to a logical communication entity used forcommunication with a base station 105 (e.g., over a carrier), and may beassociated with an identifier for distinguishing neighboring cells(e.g., a physical cell identifier (PCID), a virtual cell identifier(VCID)) operating via the same or a different carrier. In some examples,a carrier may support multiple cells, and different cells may beconfigured according to different protocol types (e.g., machine-typecommunication (MTC), narrowband Internet-of-Things (NB-IoT), enhancedmobile broadband (eMBB), or others) that may provide access fordifferent types of devices. In some cases, the term “cell” may refer toa portion of a geographic coverage area 110 (e.g., a sector) over whichthe logical entity operates.

UEs 115 may be dispersed throughout the wireless communications system100, and each UE 115 may be stationary or mobile. A UE 115 may also bereferred to as a mobile device, a wireless device, a remote device, ahandheld device, or a subscriber device, or some other suitableterminology, where the “device” may also be referred to as a unit, astation, a terminal, or a client. A UE 115 may also be a personalelectronic device such as a cellular phone, a personal digital assistant(PDA), a tablet computer, a laptop computer, or a personal computer. Insome examples, a UE 115 may also refer to a wireless local loop (WLL)station, an Internet of Things (IoT) device, an Internet of Everything(IoE) device, or an MTC device, or the like, which may be implemented invarious articles such as appliances, vehicles, meters, or the like.

Some UEs 115, such as MTC or IoT devices, may be low cost or lowcomplexity devices, and may provide for automated communication betweenmachines (e.g., via Machine-to-Machine (M2M) communication). M2Mcommunication or MTC may refer to data communication technologies thatallow devices to communicate with one another or a base station 105without human intervention. In some examples, M2M communication or MTCmay include communications from devices that integrate sensors or metersto measure or capture information and relay that information to acentral server or application program that can make use of theinformation or present the information to humans interacting with theprogram or application. Some UEs 115 may be designed to collectinformation or enable automated behavior of machines. Examples ofapplications for MTC devices include smart metering, inventorymonitoring, water level monitoring, equipment monitoring, healthcaremonitoring, wildlife monitoring, weather and geological eventmonitoring, fleet management and tracking, remote security sensing,physical access control, and transaction-based business charging.

Some UEs 115 may be configured to employ operating modes that reducepower consumption, such as half-duplex communications (e.g., a mode thatsupports one-way communication via transmission or reception, but nottransmission and reception simultaneously). In some examples half-duplexcommunications may be performed at a reduced peak rate. Other powerconservation techniques for UEs 115 include entering a power saving“deep sleep” mode when not engaging in active communications, oroperating over a limited bandwidth (e.g., according to narrowbandcommunications). In some cases, UEs 115 may be designed to supportcritical functions (e.g., mission critical functions), and a wirelesscommunications system 100 may be configured to provide ultra-reliablecommunications for these functions.

In some cases, a UE 115 may also be able to communicate directly withother UEs 115 (e.g., using a peer-to-peer (P2P) or device-to-device(D2D) protocol). One or more of a group of UEs 115 utilizing D2Dcommunications may be within the geographic coverage area 110 of a basestation 105. Other UEs 115 in such a group may be outside the geographiccoverage area 110 of a base station 105, or be otherwise unable toreceive transmissions from a base station 105. In some cases, groups ofUEs 115 communicating via D2D communications may utilize a one-to-many(1:M) system in which each UE 115 transmits to every other UE 115 in thegroup. In some cases, a base station 105 facilitates the scheduling ofresources for D2D communications. In other cases, D2D communications arecarried out between UEs 115 without the involvement of a base station105.

Base stations 105 may communicate with the core network 130 and with oneanother. For example, base stations 105 may interface with the corenetwork 130 through backhaul links 132 (e.g., via an Si or otherinterface). Base stations 105 may communicate with one another overbackhaul links 134 (e.g., via an X2 or other interface) either directly(e.g., directly between base stations 105) or indirectly (e.g., via corenetwork 130).

The core network 130 may provide user authentication, accessauthorization, tracking, Internet Protocol (IP) connectivity, and otheraccess, routing, or mobility functions. The core network 130 may be anevolved packet core (EPC), which may include at least one mobilitymanagement entity (MME), at least one serving gateway (S-GW), and atleast one Packet Data Network (PDN) gateway (P-GW). The MME may managenon-access stratum (e.g., control plane) functions such as mobility,authentication, and bearer management for UEs 115 served by basestations 105 associated with the EPC. User IP packets may be transferredthrough the S-GW, which itself may be connected to the P-GW. The P-GWmay provide IP address allocation as well as other functions. The P-GWmay be connected to the network operators IP services. The operators IPservices may include access to the Internet, Intranet(s), an IPMultimedia Subsystem (IMS), or a Packet-Switched (PS) Streaming Service.

At least some of the network devices, such as a base station 105, mayinclude subcomponents such as an access network entity, which may be anexample of an access node controller (ANC). Each access network entitymay communicate with UEs 115 through a number of other access networktransmission entities, which may be referred to as a radio head, a smartradio head, or a transmission/reception point (TRP). In someconfigurations, various functions of each access network entity or basestation 105 may be distributed across various network devices (e.g.,radio heads and access network controllers) or consolidated into asingle network device (e.g., a base station 105).

Wireless communications system 100 may operate using one or morefrequency bands, typically in the range of 300 MHz to 300 GHz.Generally, the region from 300 MHz to 3 GHz is known as the ultra-highfrequency (UHF) region or decimeter band, since the wavelengths rangefrom approximately one decimeter to one meter in length. UHF waves maybe blocked or redirected by buildings and environmental features.However, the waves may penetrate structures sufficiently for a macrocell to provide service to UEs 115 located indoors. Transmission of UHFwaves may be associated with smaller antennas and shorter range (e.g.,less than 100 km) compared to transmission using the smaller frequenciesand longer waves of the high frequency (HF) or very high frequency (VHF)portion of the spectrum below 300 MHz.

Wireless communications system 100 may also operate in a super highfrequency (SHF) region using frequency bands from 3 GHz to 30 GHz, alsoknown as the centimeter band. The SHF region includes bands such as the5 GHz industrial, scientific, and medical (ISM) bands, which may be usedopportunistically by devices that can tolerate interference from otherusers.

Wireless communications system 100 may also operate in an extremely highfrequency (EHF) region of the spectrum (e.g., from 30 GHz to 300 GHz),also known as the millimeter band. In some examples, wirelesscommunications system 100 may support millimeter wave (mmW)communications between UEs 115 and base stations 105, and EHF antennasof the respective devices may be even smaller and more closely spacedthan UHF antennas. In some cases, this may facilitate use of antennaarrays within a UE 115. However, the propagation of EHF transmissionsmay be subject to even greater atmospheric attenuation and shorter rangethan SHF or UHF transmissions. Techniques disclosed herein may beemployed across transmissions that use one or more different frequencyregions, and designated use of bands across these frequency regions maydiffer by country or regulating body.

In some cases, wireless communications system 100 may utilize bothlicensed and unlicensed radio frequency spectrum bands. For example,wireless communications system 100 may employ License Assisted Access(LAA), LTE-Unlicensed (LTE-U) radio access technology, or NR technologyin an unlicensed band such as the 5 GHz ISM band. When operating inunlicensed radio frequency spectrum bands, wireless devices such as basestations 105 and UEs 115 may employ listen-before-talk (LBT) proceduresto ensure a frequency channel is clear before transmitting data. In somecases, operations in unlicensed bands may be based on a CA configurationin conjunction with CCs operating in a licensed band (e.g., LAA).Operations in unlicensed spectrum may include downlink transmissions,uplink transmissions, peer-to-peer transmissions, or a combination ofthese. Duplexing in unlicensed spectrum may be based on frequencydivision duplexing (FDD), time division duplexing (TDD), or acombination of both.

In some examples, base station 105 or UE 115 may be equipped withmultiple antennas, which may be used to employ techniques such astransmit diversity, receive diversity, multiple-input multiple-output(MIMO) communications, or beamforming. For example, wirelesscommunications system 100 may use a transmission scheme between atransmitting device (e.g., a base station 105) and a receiving device(e.g., a UE 115), where the transmitting device is equipped withmultiple antennas and the receiving devices are equipped with one ormore antennas. MIMO communications may employ multipath signalpropagation to increase the spectral efficiency by transmitting orreceiving multiple signals via different spatial layers, which may bereferred to as spatial multiplexing. The multiple signals may, forexample, be transmitted by the transmitting device via differentantennas or different combinations of antennas. Likewise, the multiplesignals may be received by the receiving device via different antennasor different combinations of antennas. Each of the multiple signals maybe referred to as a separate spatial stream, and may carry bitsassociated with the same data stream (e.g., the same codeword) ordifferent data streams. Different spatial layers may be associated withdifferent antenna ports used for channel measurement and reporting. MIMOtechniques include single-user MIMO (SU-MIMO) where multiple spatiallayers are transmitted to the same receiving device, and multiple-userMIMO (MU-MIMO) where multiple spatial layers are transmitted to multipledevices.

Beamforming, which may also be referred to as spatial filtering,directional transmission, or directional reception, is a signalprocessing technique that may be used at a transmitting device or areceiving device (e.g., a base station 105 or a UE 115) to shape orsteer an antenna beam (e.g., a transmit beam or receive beam) along aspatial path between the transmitting device and the receiving device.Beamforming may be achieved by combining the signals communicated viaantenna elements of an antenna array such that signals propagating atparticular orientations with respect to an antenna array experienceconstructive interference while others experience destructiveinterference. The adjustment of signals communicated via the antennaelements may include a transmitting device or a receiving deviceapplying certain amplitude and phase offsets to signals carried via eachof the antenna elements associated with the device. The adjustmentsassociated with each of the antenna elements may be defined by abeamforming weight set associated with a particular orientation (e.g.,with respect to the antenna array of the transmitting device orreceiving device, or with respect to some other orientation).

In one example, a base station 105 may use multiple antennas or antennaarrays to conduct beamforming operations for directional communicationswith a UE 115. For instance, some signals (e.g. synchronization signals,reference signals, beam selection signals, or other control signals) maybe transmitted by a base station 105 multiple times in differentdirections, which may include a signal being transmitted according todifferent beamforming weight sets associated with different directionsof transmission. Transmissions in different beam directions may be usedto identify (e.g., by the base station 105 or a receiving device, suchas a UE 115) a beam direction for subsequent transmission and/orreception by the base station 105. Some signals, such as data signalsassociated with a particular receiving device, may be transmitted by abase station 105 in a single beam direction (e.g., a directionassociated with the receiving device, such as a UE 115). In someexamples, the beam direction associated with transmissions along asingle beam direction may be determined based at least in in part on asignal that was transmitted in different beam directions. For example, aUE 115 may receive one or more of the signals transmitted by the basestation 105 in different directions, and the UE 115 may report to thebase station 105 an indication of the signal it received with a highestsignal quality, or an otherwise acceptable signal quality. Althoughthese techniques are described with reference to signals transmitted inone or more directions by a base station 105, a UE 115 may employsimilar techniques for transmitting signals multiple times in differentdirections (e.g., for identifying a beam direction for subsequenttransmission or reception by the UE 115), or transmitting a signal in asingle direction (e.g., for transmitting data to a receiving device).

A receiving device (e.g., a UE 115, which may be an example of a mmWreceiving device) may try multiple receive beams when receiving varioussignals from the base station 105, such as synchronization signals,reference signals, beam selection signals, or other control signals. Forexample, a receiving device may try multiple receive directions byreceiving via different antenna subarrays, by processing receivedsignals according to different antenna subarrays, by receiving accordingto different receive beamforming weight sets applied to signals receivedat a plurality of antenna elements of an antenna array, or by processingreceived signals according to different receive beamforming weight setsapplied to signals received at a plurality of antenna elements of anantenna array, any of which may be referred to as “listening” accordingto different receive beams or receive directions. In some examples areceiving device may use a single receive beam to receive along a singlebeam direction (e.g., when receiving a data signal). The single receivebeam may be aligned in a beam direction determined based at least inpart on listening according to different receive beam directions (e.g.,a beam direction determined to have a highest signal strength, highestsignal-to-noise ratio, or otherwise acceptable signal quality based atleast in part on listening according to multiple beam directions).

In some cases, the antennas of a base station 105 or UE 115 may belocated within one or more antenna arrays, which may support MIMOoperations, or transmit or receive beamforming. For example, one or morebase station antennas or antenna arrays may be co-located at an antennaassembly, such as an antenna tower. In some cases, antennas or antennaarrays associated with a base station 105 may be located in diversegeographic locations. A base station 105 may have an antenna array witha number of rows and columns of antenna ports that the base station 105may use to support beamforming of communications with a UE 115.Likewise, a UE 115 may have one or more antenna arrays that may supportvarious MIMO or beamforming operations.

In some cases, wireless communications system 100 may be a packet-basednetwork that operate according to a layered protocol stack. In the userplane, communications at the bearer or Packet Data Convergence Protocol(PDCP) layer may be IP-based. A Radio Link Control (RLC) layer may insome cases perform packet segmentation and reassembly to communicateover logical channels. A Medium Access Control (MAC) layer may performpriority handling and multiplexing of logical channels into transportchannels. The MAC layer may also use hybrid automatic repeat request(HARQ) to provide retransmission at the MAC layer to improve linkefficiency. In the control plane, the Radio Resource Control (RRC)protocol layer may provide establishment, configuration, and maintenanceof an RRC connection between a UE 115 and a base station 105 or corenetwork 130 supporting radio bearers for user plane data. At thePhysical (PHY) layer, transport channels may be mapped to physicalchannels.

In some cases, UEs 115 and base stations 105 may support retransmissionsof data to increase the likelihood that data is received successfully.HARQ feedback is one technique of increasing the likelihood that data isreceived correctly over a communication link 125. HARQ may include acombination of error detection (e.g., using a cyclic redundancy check(CRC)), forward error correction (FEC), and retransmission (e.g.,automatic repeat request (ARQ)). HARQ may improve throughput at the MAClayer in poor radio conditions (e.g., signal-to-noise conditions). Insome cases, a wireless device may support same-slot HARQ feedback, wherethe device may provide HARQ feedback in a specific slot for datareceived in a previous symbol in the slot. In other cases, the devicemay provide HARQ feedback in a subsequent slot, or according to someother time interval.

Time intervals in LTE or NR may be expressed in multiples of a basictime unit, which may, for example, refer to a sampling period of T_(s)=1/30,720,000 seconds. Time intervals of a communications resource may beorganized according to radio frames each having a duration of 10milliseconds (ms), where the frame period may be expressed asT_(f)=307,200 T_(s). The radio frames may be identified by a systemframe number (SFN) ranging from 0 to 1023. Each frame may include 10subframes numbered from 0 to 9, and each subframe may have a duration of1 ms. A subframe may be further divided into 2 slots each having aduration of 0.5 ms, and each slot may contain 6 or 7 modulation symbolperiods (e.g., depending on the length of the cyclic prefix prepended toeach symbol period). Excluding the cyclic prefix, each symbol period maycontain 2048 sampling periods. In some cases, a subframe may be thesmallest scheduling unit of the wireless communications system 100, andmay be referred to as a transmission time interval (TTI). In othercases, a smallest scheduling unit of the wireless communications system100 may be shorter than a subframe or may be dynamically selected (e.g.,in bursts of shortened TTIs (sTTIs) or in selected component carriersusing sTTIs).

In some wireless communications systems, a slot may further be dividedinto multiple mini-slots containing one or more symbols. In someinstances, a symbol of a mini-slot or a mini-slot may be the smallestunit of scheduling. Each symbol may vary in duration depending on thesubcarrier spacing or frequency band of operation, for example. Further,some wireless communications systems may implement slot aggregation inwhich multiple slots or mini-slots are aggregated together and used forcommunication between a UE 115 and a base station 105.

The term “carrier” refers to a set of radio frequency spectrum resourceshaving a defined physical layer structure for supporting communicationsover a communication link 125. For example, a carrier of a communicationlink 125 may include a portion of a radio frequency spectrum band thatis operated according to physical layer channels for a given radioaccess technology. Each physical layer channel may carry user data,control information, or other signaling. A carrier may be associatedwith a pre-defined frequency channel (e.g., an E-UTRA absolute radiofrequency channel number (EARFCN)), and may be positioned according to achannel raster for discovery by UEs 115. Carriers may be downlink oruplink (e.g., in an FDD mode), or be configured to carry downlink anduplink communications (e.g., in a TDD mode). In some examples, signalwaveforms transmitted over a carrier may be made up of multiplesub-carriers (e.g., using multi-carrier modulation (MCM) techniques suchas OFDM or DFT-s-OFDM).

The organizational structure of the carriers may be different fordifferent radio access technologies (e.g., LTE, LTE-A, LTE-A Pro, NR,etc.). For example, communications over a carrier may be organizedaccording to TTIs or slots, each of which may include user data as wellas control information or signaling to support decoding the user data. Acarrier may also include dedicated acquisition signaling (e.g.,synchronization signals or system information, etc.) and controlsignaling that coordinates operation for the carrier. In some examples(e.g., in a carrier aggregation configuration), a carrier may also haveacquisition signaling or control signaling that coordinates operationsfor other carriers.

Physical channels may be multiplexed on a carrier according to varioustechniques. A physical control channel and a physical data channel maybe multiplexed on a downlink carrier, for example, using time divisionmultiplexing (TDM) techniques, frequency division multiplexing (FDM)techniques, or hybrid TDM-FDM techniques. In some examples, controlinformation transmitted in a physical control channel may be distributedbetween different control regions in a cascaded manner (e.g., between acommon control region or common search space and one or more UE-specificcontrol regions or UE-specific search spaces).

A carrier may be associated with a particular bandwidth of the radiofrequency spectrum, and in some examples the carrier bandwidth may bereferred to as a “system bandwidth” of the carrier or the wirelesscommunications system 100. For example, the carrier bandwidth may be oneof a number of predetermined bandwidths for carriers of a particularradio access technology (e.g., 1.4, 3, 5, 10, 15, 20, 40, or 80 MHz). Insome examples, each served UE 115 may be configured for operating overportions or all of the carrier bandwidth. In other examples, some UEs115 may be configured for operation using a narrowband protocol typethat is associated with a predefined portion or range (e.g., set ofsubcarriers or RBs) within a carrier (e.g., “in-band” deployment of anarrowband protocol type).

In a system employing MCM techniques, a resource element may consist ofone symbol period (e.g., a duration of one modulation symbol) and onesubcarrier, where the symbol period and subcarrier spacing are inverselyrelated. The number of bits carried by each resource element may dependon the modulation scheme (e.g., the order of the modulation scheme).Thus, the more resource elements that a UE 115 receives and the higherthe order of the modulation scheme, the higher the data rate may be forthe UE 115. In MIMO systems, a wireless communications resource mayrefer to a combination of a radio frequency spectrum resource, a timeresource, and a spatial resource (e.g., spatial layers), and the use ofmultiple spatial layers may further increase the data rate forcommunications with a UE 115.

Devices of the wireless communications system 100 (e.g., base stations105 or UEs 115) may have a hardware configuration that supportscommunications over a particular carrier bandwidth, or may beconfigurable to support communications over one of a set of carrierbandwidths. In some examples, the wireless communications system 100 mayinclude base stations 105 and/or UEs 115 that can support simultaneouscommunications via carriers associated with more than one differentcarrier bandwidth.

Wireless communications system 100 may support communication with a UE115 on multiple cells or carriers, a feature which may be referred to ascarrier aggregation (CA) or multi-carrier operation. A UE 115 may beconfigured with multiple downlink CCs and one or more uplink CCsaccording to a carrier aggregation configuration. Carrier aggregationmay be used with both FDD and TDD component carriers.

In some cases, wireless communications system 100 may utilize enhancedcomponent carriers (eCCs). An eCC may be characterized by one or morefeatures including wider carrier or frequency channel bandwidth, shortersymbol duration, shorter TTI duration, or modified control channelconfiguration. In some cases, an eCC may be associated with a carrieraggregation configuration or a dual connectivity configuration (e.g.,when multiple serving cells have a suboptimal or non-ideal backhaullink). An eCC may also be configured for use in unlicensed spectrum orshared spectrum (e.g., where more than one operator is allowed to usethe spectrum). An eCC characterized by wide carrier bandwidth mayinclude one or more segments that may be utilized by UEs 115 that arenot capable of monitoring the whole carrier bandwidth or are otherwiseconfigured to use a limited carrier bandwidth (e.g., to conserve power).

In some cases, an eCC may utilize a different symbol duration than otherCCs, which may include use of a reduced symbol duration as compared withsymbol durations of the other CCs. A shorter symbol duration may beassociated with increased spacing between adjacent subcarriers. Adevice, such as a UE 115 or base station 105, utilizing eCCs maytransmit wideband signals (e.g., according to frequency channel orcarrier bandwidths of 20, 40, 60, 80 MHz, etc.) at reduced symboldurations (e.g., 16.67 microseconds). A TTI in eCC may consist of one ormultiple symbol periods. In some cases, the TTI duration (that is, thenumber of symbol periods in a TTI) may be variable.

Wireless communications systems such as an NR system may utilize anycombination of licensed, shared, and unlicensed spectrum bands, amongothers. The flexibility of eCC symbol duration and subcarrier spacingmay allow for the use of eCC across multiple spectrums. In someexamples, NR shared spectrum may increase spectrum utilization andspectral efficiency, specifically through dynamic vertical (e.g., acrossthe frequency domain) and horizontal (e.g., across the time domain)sharing of resources.

Wireless communications system 100 may in some cases support BWPs, whichmay allow a UE 115 to operate within a smaller frequency range than a CCbandwidth. A UE 115 may in some cases be configured with multiple BWPs(e.g., each with different frequency locations, bandwidths, timingparameters, numerologies, etc.). Control information (e.g., DCI) may beused to trigger BWP switching for a given UE 115. For example, each UE115 may support at most one active BWP for each serving cell (e.g.,although the UE 115 may be configured with multiple BWPs per servingcell). DCI may contain a BWP identification (ID) field indicating theBWP that should be activated for a scheduled time slot (e.g., k0 slotsor k2 slots after the DCI is received). Once a BWP is activated, it mayremain active until another BWP is activated (e.g., or until a timerexpires). If the BWP ID field in the DCI is different from the currentlyactive BWP, a BWP switch may be triggered (e.g., such that cross-BWPscheduling triggers a BWP switch).

The size (e.g., bit-length) of one or more (or all) fields in the DCImay be based on the currently active BWP. For example, the size of atime domain resource allocation field may be based on the number oftiming parameter (e.g., k0, k2) values supported by the currentlyactivated BWP. If the BWP ID field indicates another BWP (e.g., a BWPdifferent from the currently active BWP) that supports a differentnumber of potential timing parameter values, the time domain resourceallocation field based on the currently active BWP may not be largeenough (e.g., or may be too large) for the newly indicated BWP. In somecases, a base station may zero-pad bit fields that are too small andtruncate bit fields that are too large for the newly indicated BWP.

That is, for cross-BWP scheduling, one or more bit fields in a DCItransmission (e.g., a time-domain resource allocation field) may besized based on the current BWP but may index the new BWP table (e.g., aPDSCH-symbol allocation table, a PUSCH symbol allocation table, etc.).When the number of bits in the time-domain resource allocation field isnot sufficient to address all rows in the new BWP table, a UE 115 mayinterpret the field to reference only the lower indexed rows of thetable (e.g., starting from a first row and proceeding to a lastaddressable row). It is to be understood that in some cases, the UE 115may interpret the field to reference only the higher indexed rows of thetable (e.g., starting from a last row and proceeding upwards to a lastaddressable row), some internal subset of rows in the table, etc.

When the number of bits in the time-domain resource allocation field istoo large for the new BWP table, a UE 115 may expect only the lower bits(e.g., least significant bits) of the bit field to be used to addressthe rows of the new BWP table (e.g., such that truncation may start fromthe most significant bit). It is to be understood that truncation mayalternatively start from the least significant bit without deviatingfrom the scope of the present disclosure. For cross BWP-scheduling inwhich the BWPs have different numerologies (e.g., a first BWP useslonger symbol periods than a second BWP), the numerology of the new BWPmay be used for interpretation of timing parameters (e.g., k0 and k2 asfor DCI format 1-1 or 0-1, respectively). For example, using thenumerology of the new BWP may provide consistency with cross-carrierscheduling (e.g., for carrier aggregation) with different numerologiesfor the timing parameters.

FIG. 2 illustrates an example of a wireless communications system 200that supports timing parameter management for bandwidth part switchingin accordance with aspects of the present disclosure. In some examples,wireless communications system 200 may implement aspects of wirelesscommunications system 100. Wireless communications system 200 mayinclude a base station 105-a and a UE 15-a that may communicateinformation using a carrier 205. The wireless communications system 200may be configured to use one or more BWPs 210 to communicate informationin the overall carrier 205.

A BWP 210 may be a group of contiguous physical resource blocks (PRBs).The bandwidth of the BWP 210 may be equal to or smaller than a maximumbandwidth capability supported by a UE 115-a or the bandwidth of theoverall carrier 205. In some cases, the bandwidth of the BWP 210 may beat least as large as a bandwidth of a synchronization signal (SS) block.

In some cases, the BWP 210 may be a dynamically-configured (orsemi-statically configured) portion of the overall carrier 205. The BWP210 may include a number of dynamically (or semi-statically)configurable parameters. Examples of such parameters may includefrequency location (e.g., center frequency), bandwidth (e.g., number ofPRBs), numerology (e.g., sub-carrier spacing and/or cyclic prefix type),or a combination thereof. The parameters of the BWP 210 may becommunicated using DCI, a medium access control (MAC) control element(CE), RRC signaling, and/or a time pattern (e.g., in a discontinuousreception situation). The granularity of certain parameters may be thesize of one PRB (e.g., a bandwidth granularity may be 1 PRB andfrequency location granularity may be 1 PRB).

A BWP 210 may be configured for downlink and for uplink. BWPs 210 may beconfigured independently for each cell (e.g., primary cells (PCells)and/or secondary cells (SCells)). In such cases, if an SCell isdeactivated, the BWPs of that cell may also be deactivated. In somecases, the UE 115-a may be configured to communicate using one or moredownlink BWPs and/or one or more uplink BWPs at the same time. In somecases, there may be at most one active downlink BWP and at most oneactive uplink BWP at a given time for a serving cell. A PCell may be thecell that handles the RRC connection between the UE 115-a and the basestation 105-a and an SCell may be any other serving cell establishedbetween the UE 115-a and the base station 105-a.

BWPs 210 may be used in both paired spectrum and unpaired spectrum. Inpaired spectrum, a first frequency spectrum band may be allocated (e.g.,dedicated) to downlink communications and a second frequency spectrumband may be allocated (e.g., dedicated) to uplink communications. Pairedspectrum may use FDD systems to establish two-way communications betweennodes. In unpaired spectrum, the same frequency spectrum band may beused for both uplink and downlink communications. Unpaired spectrum mayuse TDD systems to establish two-way communications between nodes. Insome cases, for paired spectrum, a maximum number of BWP configurationsmay be four downlink BWPs and four uplink BWPs. In some cases, forunpaired spectrum, a maximum number of BWP configurations may be fourdownlink/uplink BWP pairs. In some cases, for FDD, the BWPs for downlinkand the BWPs for uplink may be configured independently on aper-component carrier (CC) basis. In some cases, for TDD, a joint set ofdownlink BWPs and uplink BWPs may be configured on a per-CC basis.

In some cases, an active BWP 210 of the UE 115-a may not span afrequency spectrum band larger than a bandwidth of a CC of the UE 115-a.The configuration for a downlink BWP may include at least one controlresource set (coreset). In some cases, at least one configured downlinkBWP may include a coreset with a control search space (CSS) in a primarycomponent carrier (PCC). In some cases, in a PCell for the UE 115-a, aCSS may be configured in each BWP 210. In some cases, each configureddownlink BWP may include at least one coreset with a UE-specific searchspace (UE-SS) for the case of single active BWP at a given time. In somecases, if the active downlink BWP does not include a CSS, then UE 115-amay not monitor the CSS. The CSS may include communication resourceswhere the UE is configured to look for physical downlink control channel(PDCCH) which carries downlink control information (DCI) as its payload.

Upon establishing an RRC connection, the UE 115-a or the base station105-a may activate a default configuration of one or more BWPs 210(e.g., a downlink BWP and an uplink BWP). The UE 115-a and the basestation 105-a may use those default BWPs 210 until the BWPs 210 areexplicitly configured or reconfigured.

The wireless communications system 200 may also support a BWP switchingevent. In some cases, the UE 115-a (or the base station 105-a) beconfigured to use one BWP 210 of a carrier 205 at a time. In such cases,if the UE 115-a (or the base station 105-a) is to use a different BWPfor the carrier 205, the UE 115-a (or the base station 105-a) mayreconfigure its BWP 210. As part of a BWP switching event, the UE 115-a(or the base station 105-a) may switch the active BWP to a target BWPwithin a given serving cell. A BWP switching event may be signaled usingDCI. In some cases, a downlink BWP 210 may be switched using a downlinkscheduling DCI and an uplink BWP 210 may be switched using an uplinkscheduling DCI. In some cases, either downlink BWPs or uplink BWPs maybe switched using either downlink DCI or uplink DCI. In some cases, thewireless communications system 200 may support a timer for timer-basedactive BWP switching. In such a time-based configuration, the BWP 210may switch from an active BWP 210 to a default BWP 210 based on thetimer expiring.

As described herein, various techniques may be used for efficient BWPswitching in wireless communications system 200. For example, BWPswitching may include time-domain resource allocation (e.g., to allowfor transition between BWPs 210). Aspects of the present disclosurerelate to support for such time domain resource allocation includingconsiderations for timing parameter tables, timing parameterinterpretations, BWP signaling, etc.

FIG. 3 illustrates an example of a communications diagram 300 thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure. In some examples,communications diagram 300 may implement aspects of wirelesscommunication system 100. Communications diagram includes base station105-b and UE 115-b, each of which may be an example of the correspondingdevice described with reference to FIG. 1.

Base station 105-b and UE 115-b may establish communication over a PCCas described with reference to FIG. 2. For example, base station 105-bmay configure UE 115-b with one or more BWPs (including BWP 305) via RRCsignaling, where each BWP may be associated with one or more timingparameter tables 325 (e.g., one table for uplink per BWP and one tablefor downlink per BWP). Each timing parameter table 325 may, forinstance, contain up to sixteen rows, where each row may be configuredwith k0 (for a downlink timing parameter table 325) or k2 (for an uplinktiming parameter table 325), an index into a table or equation capturingvalid combinations of starting symbols and symbol lengths (e.g., whichmay be jointly encoded), and a mapping type (e.g., a PDSCH mapping typefor a downlink timing parameter table 325 or a PUSCH mapping type for anuplink timing parameter table 325). In the present example, base station105-b may configure UE 115-b with timing parameter table 325-a fordownlink communications in BWP 305 and timing parameter table 325-b fordownlink communications in another BWP (e.g., another BWP for which k0and a PDSCH mapping type are configured along with the PDSCH startingsymbols and symbol lengths). Though described in the context of downlinkcommunications, analogous techniques may be employed for uplinkcommunications (e.g., using BWPs for which k2 and a PUSCH mapping typeare configured along with the PUSCH starting symbols and symbollengths).

In some cases, the devices may subsequently communicate via BWP 305(e.g., which may be an example of BWP 210). Communications over BWP 305may in some cases be supported by DCI 310. For example, DCI 310 may beused for downlink resource allocation (e.g., DCI format 1_1), uplinkresource allocation (e.g., DCI format 0_1), etc. DCI 310 may include aplurality of bit-fields including an BWP ID field 315 and a resourceallocation field 320 (e.g., which may alternatively be referred to as atime-domain resource allocation field 320). As described above, one ormore bit-fields of DCI 310 may be sized based at least in part on BWP305.

For example, resource allocation field 320 may have a single bit todistinguish between rows 330-a of timing parameter table 325-a. However,in cases in which BWP ID field 315 indicates another BWP (e.g., the BWPfor which timing parameter table 325-b was configured), timing parametermanagement may support the BWP switching. Because resource allocationfield 320 contains a single bit, only rows 330-b of timing parametertable 325-b may be addressable by DCI 310 (e.g., such that rows 330-cmay be unavailable for the BWP switch). Aspects of the presentdisclosure relate to considerations for a format of timing parametertable 325-b to support BWP switching (e.g., such that rows 330-b maycontain timing parameters that support efficient BWP switching).

Though described in the context of two timing parameter tables 325, insome cases BWP switching may be supported by a single timing parametertable 325 (e.g., a table configured via RRC signaling for BWP switchingevents). Such a table may, for example, be supported by DCI 310 thatindicates a BWP switch having a set (e.g., pre-configured, negotiated,etc.) length for resource allocation field 320.

FIG. 4 illustrates an example of a transmission scheme 400 that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure. In some examples, transmissionscheme 400 may implement aspects of wireless communications system 100.For example, transmission scheme 400 may illustrate aspects ofcommunications between a base station 105 and a UE 115 over multiple(e.g., three) BWPs. For example, the base station 105 may configure theUE 115 with timing parameter table 420-a for BWP 405 (e.g., a startingBWP), timing parameter table 420-b for BWP 410 (e.g. which may supportdata communications), and timing parameter table 420-c for BWP 415(e.g., a default BWP).

Though described in the context of three BWPs, it is to be understoodthat any suitable number of BWPs may be supported using techniquesdescribed with reference to transmission scheme 400. Similarly, thesizes and contents of timing parameter tables 420 are included for thesake of explanation and are not limiting of scope. For example, thoughdescribed in the context of k0 timing parameters, it is to be understoodthat analogous techniques may be used for k2 timing parametermanagement. Additionally, in some cases timing parameter tables 420 maycontain up to sixteen (e.g., or more) rows. At least some of the rows ofa given timing parameter table may share a common k0 or k2 value (e.g.,but may be distinguished by a mapping type and/or a symbol lengthindicator value (SLIV)). For the sake of explanation, the rows of timingparameter tables 420 are considered to be distinguished based on k0values.

In the present example, the base station 105 may transmit DCI duringslot 425-a over BWP 405. For example, the DCI in slot 425-a may be anexample of DCI 310 described with reference to FIG. 3. Because the DCIin slot 425-a is transmitted over BWP 405, it may have a resourceallocation field with a bit length of zero bits (e.g., because timingparameter table 420-a contains a single row). However, the DCI in slot425-a may contain a BWP ID field indicating a BWP switch (e.g., a fieldindicating BWP 410). That is, the DCI in slot 425-a may schedule a PDSCHtransmission over BWP 410. As such, the resource allocation field of theDCI in slot 425-a may be understood by a UE 115 receiving the DCI toindex timing parameter table 420-b (e.g., the timing parameter table 420corresponding to the BWP indicated in the BWP ID field). Because theresource allocation field of the DCI in slot 425-a may not be able toaddress the second or third rows of timing parameter table 420-b, the UE115 may identify a value of k0=4 for the BWP switch. For example, k0=4may mean that a duration 430 of four slots (e.g., or some other suitabletime interval) may elapse between slot 425-a and the scheduled PDSCHtransmission in slot 425-b.

The UE 115-b may receive the scheduled PDSCH transmission in slot 425-bover BWP 410. In some cases, the UE 115-b may receive DCI in slot 425-cscheduling a PDSCH transmission in slot 425-c over BWP 410. That is,because a resource allocation field of the DCI in slot 425-c may besized based on timing parameter table 420-b (e.g., may have a length oftwo bits), all rows in timing parameter table 420-b may be addressableby the DCI in slot 425-b. Accordingly, the DCI in slot 425-c mayindicate a value of k0=0 (e.g., a delay of zero slots between the DCIscheduling the PDSCH transmission and the PDSCH transmission itself).Accordingly, the UE 115-b may receive the PDSCH transmission in slot425-c.

After slot 425-c, a BWP timer 435 may run (e.g., for a configured,negotiated, etc. number of slots 425). Though illustrated as containingfive slots 425, it is to be understood that BWP timer 435 may in somecases contain more or fewer than five slots 425. BWP timer 435 may runas long as no data is received by the UE 115. Thus, the device may stillmonitor BWP 410 (e.g., as illustrated by BWP 410-b) without receivingdata (e.g., which may reduce a power consumption of the device comparedto slots 425-b and 425-c, which are illustrated by BWP 410-a). Thus, itis to be understood that BWP 410-a and BWP 410-b may refer to a same BWP(e.g., a same set of PRBs) but may represent different power consumptionover that BWP based on whether data is being transferred.

At the expiration of BWP timer 435, the UE 115 may transition to BWP 415(e.g., which may be an example of a default BWP). The transition to BWP415 may alternatively (e.g., rather than being based on the expirationof BWP timer 435) be based on explicit DCI signaling (e.g., in a slotcontained within BWP timer 435). In some cases, the transition to BWP415 may occupy a duration 440 based on an indicated (e.g., in the caseof the explicit DCI signaling) or understood (e.g., in the case of theexpiration of the timer) k0 value. By way of example, if explicit DCIsignaling indicates k0=2 (e.g., because all rows of timing parametertable 420-b are addressable by DCI sent over BWP 410), duration 440 maylast two slots (e.g., during which time the UE 115 does not expect toreceive downlink signals from the base station 105).

In some cases, the UE 115 may receive DCI in slot 425-d indicating k0=1(e.g., indexing the third row of timing parameter table 420-c). Forexample, such a k0 configuration (e.g., a small non-zero k0 value) maysupport microsleep operations for the UE 115. Accordingly, the UE 115may receive a PDSCH transmission in slot 425-e based on schedulingreceived via DCI in slot 425-d. In slot 425-f, the UE may receive DCIindicating k0=2 (e.g., indexing the second row of timing parameter table420-b) and indicating a BWP switch (e.g., to BWP 410). Because timingparameter table 420-b and timing parameter table 420-c are of a samesize, no transformation (e.g., truncation or zero-padding) may be neededfor the DCI. Based on the DCI in slot 425-f, the UE may receive PDSCH inslot 425-g (e.g., following the two slots indicated by the DCI andrepresented by duration 445).

In some cases, consideration may be given for support of minimum k0(e.g., or k2) values in a layout of timing parameter tables 420. Forexample, a wireless communications system may benefit from a timingparameter table 420 associated with a wakeup BWP (e.g., BWP 405) havinga large k0 (e.g., k0=4) for PDCCH to PDSCH modem wake-up. Similarly, thewireless communications system may benefit from a timing parameter table420 having a small k0 (e.g., k0=0) for low latency access during datascheduling. Lastly, the wireless communications system may benefit froma timing parameter table having a small, non-zero k0 (e.g., k0=1) formicrosleep operations, as described above. Thus, the minimum k0 valuemay be important for power saving at a UE 115 (e.g., by providingflexibility in PDSCH modem activation and maintenance). In accordancewith aspects of the present disclosure, one or more timing parametertables 420 may be configured such that the lowest-indexed rows (e.g.,the rows which are addressable by shorter resource allocation fields)may contain important k0 values for one or more of the operationsdescribed above. In some examples, the lowest-indexed rows (e.g., therows which are addressable by shorter resource allocation fields) mayinclude the k0 values which may be ordered from the larger k0 valuesbeing in the accessible portion of the timing parameter table, to thelower k0 values being further down in the timing parameter table. Insome examples, the minimum k0 (e.g., or k2) value may be adjusted whenswitching communications from the first BWP to the second BWP.

FIG. 5 illustrates an example of a transmission scheme 500 that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure. In some examples, transmissionscheme 500 may implement aspects of wireless communications system 100.For example, transmission scheme 400 may illustrate aspects ofcommunications between a base station 105 and a UE 115 over multiple(e.g., two) BWPs. For example, the base station 105 may configure the UE115 with timing parameter table 515-a for BWP 505 (e.g., a low powerBWP) and timing parameter table 515-b for BWP 510 (e.g. a high powerBWP). For example, BWP 510 may be associated with a wider bandwidth thanBWP 505. Alternatively, BWP 510 and BWP 505 may have the same bandwidth,and the power saving for BWP 505 may be based on k0 (e.g., or k2)adaptation.

Aspects of the present example may relate to support for a two stagewakeup and efficient microsleep operations. Additionally oralternatively, aspects of the present example may relate to support forthree minimum k0 values over two BWPs (e.g., compared to the support ofthree minimum k0 values over three BWPs described with reference to FIG.4). As with FIG. 4, aspects of the following are included for the sakeof explanation and are not limiting of scope.

A UE 115 may wakeup during slot 520-a (e.g., based on a discontinuousreception cycle, a wakeup signal, or the like) and receive DCI on BWP505. The DCI may include a BWP ID of BWP 510 (e.g., cross-BWPscheduling) and a resource allocation field sized according to timingparameter table 515-a (e.g., a zero bit resource allocation field).Because of the cross-BWP scheduling, the resource allocation field mayindex into timing parameter table 515-b. Accordingly, the UE 115 maydetermine k0=4 such that duration 425 between receiving the DCI in slot520-a and receiving the PDSCH in slot 520-b may last for four slots. Forexample, such a relatively large k0 may allow sufficient time for PDCCHto PDSCH modem wakeup (e.g., thereby supporting power conservation forthe UE 115).

Once BWP 510 becomes the active BWP, the resource allocation field ofthe DCI may be sized according to timing parameter table 515-b (e.g.,such that k0=0 becomes addressable for data scheduling). Accordingly,DCI received in slot 520-c may indicate same slot PDSCH scheduling(e.g., k0=0). BWP timer 525 may be an example of BWP timer 435 describedwith reference to FIG. 4. As such, it may be an example of a durationduring which the UE 115 monitors for transmissions on BWP 510-b (e.g.,which may represent a lower transmission power than BWP 510-a duringslots 520-b and 520-c because of the lack of PDSCH). At an expiration ofBWP timer 525 (e.g., or based on explicit DCI signaling), the UE 115 mayswitch to BWP 505 (e.g., after duration 530). For example, duration 530may be based on timing parameter table 515-a (e.g., because of thetransition to BWP 505). Thus, k0=1 and duration 530 may represent oneslot. Once BWP 505 becomes the active BWP, k0 may be set to one slot(e.g., k0=1) to support microsleep operations.

A UE 115 may switch between BWP 505 and BWP 510 based on scheduling. Forexample, BWP 505 may be uses to support microsleep operations (e.g., lowpower BWP) and BWP 510 may be used (e.g., with k0=0 once BWP 510 becomesthe active BWP) for data scheduling activity.

Various considerations for support of timing parameter management withtwo BWPs are included within the scope of the present disclosure. Forexample, during normal operation (e.g., non-wakeup operation), switchingfrom BWP 505 to BWP 510 may incur a large k0 delay (e.g., even thoughthe modem is already woken up). Such limitations may, for example, beaddressed by allowing a UE 115 to infer a preferred timing parametervalue following an active-mode cross-BWP scheduling DCI (e.g., allowingthe UE 115 to infer k0=1). Additionally, aspects of the presentdisclosure may be supported by a scheduling restriction that onlycross-BWP scheduling may be allowed for wakeup slots (e.g., slots at thebeginning of some discontinuous reception cycle such as slot 520-a).Otherwise, a UE 115 may have to be prepared for same BWP scheduling witha smaller k0 (e.g., k0=1) based on timing parameter table 515-a (e.g.,unless k0 is also configured to be large for timing parameter table515-a).

Aspects of the DCI transmissions described above may apply tonon-fallback DCI operation (e.g., because the BWP switch may only besupported with non-fallback DCI). If fallback DCI is supported in thewakeup slot (e.g., slot 520-a), the fallback DCI (e.g., at least for acellular radio network temporary identifier (C-RNTI)) must also sharethe same timing parameter table 515 as the non-fallback DCI. Otherwise aUE 115 may have to be prepared for being scheduled with another set ofk0 parameters (e.g., if fallback DCI uses a default table with {1, 2, 3,. . . 8} as possible k0 values, rendering power saving infeasible.Another way to address the fallback DCI usage is not to configure acommon search space at all (e.g., and only have user-specific searchspace with non-fallback DCI support).

FIG. 6 illustrates an example of a transmission scheme 600 that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure. In some examples, transmissionscheme 600 may implement aspects of wireless communications system 100.For example, transmission scheme 600 may illustrate aspects ofcommunications between a base station 105 and a UE 115 over multiple(e.g., three) BWPs. For example, the base station 105 may configure theUE 115 with timing parameter table 620-a for BWP 605 (e.g., a defaultBWP, a narrowband BWP), timing parameter table 620-b for BWP 610 (e.g.,a wideband BWP supporting same-slot scheduling), and timing parametertable 620-c for BWP 615 (e.g., a wideband BWP supporting cross-slotscheduling).

A base station 105 may transmit DCI over BWP 605 during slot 625-a,which DCI may indicate BWP 610 (e.g., cross-BWP scheduling) in a BWP IDbit field. Because the resource allocation field of the DCI in slot625-a may be sized according to timing parameter table 620-a, the thirdrow (e.g., k0=0) of timing parameter table 620-b may not be addressableby the resource allocation field. In some examples, k0=2 may be selectedfrom timing parameter table 620-b (e.g., such that a duration 630between slot 625-a and slot 625-b may be two slots). A UE 115 receivingthe DCI may then receive PDSCH over BWP 610 in slot 625-b. Subsequently(e.g., in slot 625-c), k0=0 may be selected (e.g., because all rows oftiming parameter table 620-b may be addressable). Accordingly, the UE115 may receive the DCI scheduling PDSCH and the PDSCH itself both overBWP 610 in slot 625-c. Thus, BWP 610 may support same-slot scheduling.

In slot 625-d, the UE 115 may receive DCI over BWP 610 indicating a BWPswitch (e.g., DCI containing a BWP ID field indicating BWP 615). The DCIin slot 625-d may index into timing parameter table 620-c. Because theresource allocation field of the DCI may contain two bits (e.g., basedon timing parameter table 620-b containing three rows), a mostsignificant bit of the resource allocation field may be dropped by UE115 in interpreting the resource allocation field. That is, the UE 115may use the least significant bit of the resource allocation field todistinguish between the two rows of timing parameter table 620-c. In thepresent example, the resource allocation field may indicate k0=1 suchthat the UE 115 determines that PDSCH over BWP 615 is contained in slot625-e. BWP 615 may support cross-slot (e.g., k0=2 or k0=1) schedulingand may thus be associated with a lower transmission power cost than BWP610. DCI transmitted over BWP 615 in slot 625-f may indicate BWP 605 andselect k0=2 (e.g., such that duration 635 comprises two slots 625).Subsequently, the UE 115 may receive PDSCH over BWP 605 in slot 625-gbased on the scheduling DCI received in slot 625-f. Because timingparameter table 620-a and timing parameter table 620-c have a same size,no transformation (e.g., truncation or zero-padding) for a resourceallocation field may be needed when switching between BWP 605 and BWP615.

FIG. 7 illustrates an example of a process flow 700 that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure. In some examples, process flow 700may implement aspects of wireless communications system 100. Forexample, process flow 700 includes UE 115-c and base station 105-c, eachof which may be an example of the corresponding devices described withreference to FIG. 1.

At 705, UE 115-c (e.g., and base station 105-c) may identify a set oftiming parameter tables that each define one or more potential valuesfor a timing parameter (e.g., k0, k2) associated with a timing between alast symbol of a DCI transmission and a slot containing datacommunication between the devices. For example, the set of timingparameter tables may include a first timing parameter table associatedwith a first BWP and a second timing parameter table associated with asecond BWP. In some cases, the set of timing parameter tables may beidentified based on signaling (e.g., RRC signaling) configuring thetables.

In some cases, the first timing parameter table has a first number ofrows and the second timing parameter table has a different number ofrows. In some cases, the set of timing parameter tables further includesa third timing parameter table associated with downlink transmissionsover the first BWP while the first timing parameter table is associatedwith uplink transmissions over the first BWP. In some cases, the firstBWP has a first numerology (e.g., a first tone spacing) and the secondBWP has a second numerology (e.g., a different tone spacing), and thepotential values for the timing parameters indicated by the timingparameter tables may be based at least in part on the respective tonespacings. That is, the tone spacing may influence a duration of a slot,which may in turn influence an interpretation of the timing parameters.

At 710, base station 105-c may identify a trigger for switchingcommunications with UE 115-c from the first BWP to the second BWP. It isto be understood that prior to 710, the first BWP may represent acurrently active BWP (e.g., a wakeup BWP, a default BWP, or the like).In some cases, the trigger may include a type of data to be transmitted,an amount of data to be transmitted, an amount of traffic associatedwith one or both of the BWPs, or the like.

At 715, base station 105-c may select a value for a timing parameterbased at least in part on the trigger and the second timing parametertable. That is, base station 105-c may configure DCI to include a BWPswitching indication (e.g., a BWP ID for the second BWP) as well as aresource allocation field indicating a value for the timing parameterfrom the second timing parameter table. In some cases, the size of theresource allocation field (e.g., and thus the value selected from thesecond timing parameter table) may be based in part on the number of rowin the first timing parameter table.

At 720, base station 105-c may transmit (e.g., and UE 115-c may receive)the DCI over the first BWP. The DCI may activate the second BWP andinclude the resource allocation bit field indicating the value for thetiming parameter.

At 725, UE 115-c may identify a value for the timing parameter based onthe resource allocation bit field and the second timing parameter table.For example, the resource allocation bit field may provide an index intothe second timing parameter table as described above with reference toFIGS. 4 and 5.

At 730, UE 115-c and base station 105-c may communicate over the secondBWP in accordance with the value for the timing parameter. For example,UE 115-c may receive a PDSCH transmission from (e.g., or transmit aPUSCH transmission to) base station 105-c, where a timing of thetransmission may be based on the value for the timing parameter.

FIG. 8 shows a block diagram 800 of a device 805 that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure. The device 805 may be an example ofaspects of a UE 115 as described herein. The device 805 may include areceiver 810, a communications manager 815, and a transmitter 820. Thedevice 805 may also include a processor. Each of these components may bein communication with one another (e.g., via one or more buses).

The receiver 810 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timingparameter management for bandwidth part switching, etc.). Informationmay be passed on to other components of the device 805. The receiver 810may be an example of aspects of the transceiver 1120 described withreference to FIG. 11. The receiver 810 may utilize a single antenna or aset of antennas.

The communications manager 815 may identify a set of timing parametertables that each define one or more potential values for a timingparameter associated with a timing between receipt, from a base station,of DCI and subsequent communication with the base station, the set oftiming parameter tables including at least a first timing parametertable associated with a first BWP and a second timing parameter tableassociated with a second BWP. The communications manager 815 mayreceive, over the first BWP, a DCI transmission that activates thesecond BWP, the DCI transmission including a resource allocation bitfield indexing at least a subset of the second timing parameter table,where a size of the resource allocation bit field is based on aconfiguration of the first BWP. The communications manager 815 mayidentify a value for the timing parameter based on the second timingparameter table and the size of the resource allocation bit field. Thecommunications manager 815 may communicate with the base station overthe second BWP in accordance with the value for the timing parameter.The communications manager 815 may be an example of aspects of thecommunications manager 1110 described herein.

The communications manager 815, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 815, or itssub-components may be executed by a general-purpose processor, a DSP, anASIC, a FPGA or other programmable logic device, discrete gate ortransistor logic, discrete hardware components, or any combinationthereof designed to perform the functions described in the presentdisclosure.

The communications manager 815, or its sub-components, may be physicallylocated at various positions, including being distributed such thatportions of functions are implemented at different physical locations byone or more physical components. In some examples, the communicationsmanager 815, or its sub-components, may be a separate and distinctcomponent in accordance with various aspects of the present disclosure.In some examples, the communications manager 815, or its sub-components,may be combined with one or more other hardware components, includingbut not limited to an input/output (I/O) component, a transceiver, anetwork server, another computing device, one or more other componentsdescribed in the present disclosure, or a combination thereof inaccordance with various aspects of the present disclosure.

The transmitter 820 may transmit signals generated by other componentsof the device 805. In some examples, the transmitter 820 may becollocated with a receiver 810 in a transceiver module. For example, thetransmitter 820 may be an example of aspects of the transceiver 1120described with reference to FIG. 11. The transmitter 820 may utilize asingle antenna or a set of antennas.

FIG. 9 shows a block diagram 900 of a device 905 that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure. The device 905 may be an example ofaspects of a device 805 or a UE 115 as described herein. The device 905may include a receiver 910, a communications manager 915, and atransmitter 940. The device 905 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 910 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timingparameter management for bandwidth part switching, etc.). Informationmay be passed on to other components of the device 905. The receiver 910may be an example of aspects of the transceiver 1120 described withreference to FIG. 11. The receiver 910 may utilize a single antenna or aset of antennas.

The communications manager 915 may be an example of aspects of thecommunications manager 815 as described herein. The communicationsmanager 915 may include a table manager 920, a control manager 925, aparameter manager 930, and a data manager 935. The communicationsmanager 915 may be an example of aspects of the communications manager1110 described herein.

The table manager 920 may identify a set of timing parameter tables thateach define one or more potential values for a timing parameterassociated with a timing between receipt, from a base station, of DCIand subsequent communication with the base station, the set of timingparameter tables including at least a first timing parameter tableassociated with a first BWP and a second timing parameter tableassociated with a second BWP. The control manager 925 may receive, overthe first BWP, a DCI transmission that activates the second BWP, the DCItransmission including a resource allocation bit field indexing at leasta subset of the second timing parameter table, where a size of theresource allocation bit field is based on a configuration of the firstBWP. The parameter manager 930 may identify a value for the timingparameter based on the second timing parameter table and the size of theresource allocation bit field. The data manager 935 may communicate withthe base station over the second BWP in accordance with the value forthe timing parameter.

The transmitter 940 may transmit signals generated by other componentsof the device 905. In some examples, the transmitter 940 may becollocated with a receiver 910 in a transceiver module. For example, thetransmitter 940 may be an example of aspects of the transceiver 1120described with reference to FIG. 11. The transmitter 940 may utilize asingle antenna or a set of antennas.

FIG. 10 shows a block diagram 1000 of a communications manager 1005 thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure. The communicationsmanager 1005 may be an example of aspects of a communications manager815, a communications manager 915, or a communications manager 1110described herein. The communications manager 1005 may include a tablemanager 1010, a control manager 1015, a parameter manager 1020, and adata manager 1025. Each of these modules may communicate, directly orindirectly, with one another (e.g., via one or more buses).

The table manager 1010 may identify a set of timing parameter tablesthat each define one or more potential values for a timing parameterassociated with a timing between receipt, from a base station, of DCIand subsequent communication with the base station, the set of timingparameter tables including at least a first timing parameter tableassociated with a first BWP and a second timing parameter tableassociated with a second BWP. In some examples, the table manager 1010may receive at least one of the set of timing parameter tables from thebase station via RRC signaling. In some cases, the first timingparameter table includes a first set of rows and the second timingparameter table includes a second set of rows, each row of the first setof rows and the second set of rows indicating a potential value for thetiming parameter. In some such cases, the size of the resourceallocation bit field is based on a number of rows in the first set ofrows.

In some cases, the first timing parameter table is associated withuplink transmissions over the first BWP, and the set of timing parametertables further includes a third timing parameter table associated withdownlink transmissions over the first BWP. In some cases, the first BWPhas a first tone spacing and the second BWP has a second tone spacing,where the potential values for the timing parameter of the first timingparameter table are based on the first tone spacing and the potentialvalues for the timing parameter of the second timing parameter table arebased on the second tone spacing. In some cases, the first BWP isassociated with a lower transmission power than the second BWP.

The control manager 1015 may receive, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indexing at least a subset ofthe second timing parameter table, where a size of the resourceallocation bit field is based on a configuration of the first BWP. Insome examples, the control manager 1015 may identify a format for theDCI transmission. In some examples, the control manager 1015 may selectthe second timing parameter table from the set of timing parametertables based on the format of the DCI transmission. In some cases, theDCI transmission includes a BWP identification field that activates thesecond BWP.

The parameter manager 1020 may identify a value for the timing parameterbased on the second timing parameter table and the size of the resourceallocation bit field. In some examples, the parameter manager 1020 mayidentify a subset of bits in the resource allocation bit field, thesubset of bits indexing a row of the second set of rows. In someexamples, the parameter manager 1020 may determine the value for thetiming parameter based on the indexed row of the second set of rows. Insome examples, the parameter manager 1020 may identify a subset of thesecond set of rows that are addressable by the resource allocation bitfield. In some examples, the parameter manager 1020 may identify a rowof the subset of the second set of rows indexed by the resourceallocation bit field. In some examples, the parameter manager 1020 maydetermine the value for the timing parameter based on the indexed row.In some cases, the subset of the second set of rows includes alowest-indexed row of the second set of rows, and the lowest-indexed rowcorresponds to a preferred value of the timing parameter for switchingto the second BWP. In some cases, the subset of the second set of rowsincludes a largest value of the potential values for the timingparameter from the second plurality of rows, where the values of thetiming parameter are ordered from the larger values of the timingparameter to the smaller values of the timing parameter, for switchingto the second BWP.

In some cases, the subset of the second set of rows includes at leastone row corresponding to a preferred value of the timing parameter forcommunicating in the second BWP. In some cases, the preferred value ofthe timing parameter includes a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.

The data manager 1025 may communicate with the base station over thesecond BWP in accordance with the value for the timing parameter. Insome examples, the data manager 1025 may receive a PDSCH transmission.In some examples, the data manager 1025 may transmit a PUSCHtransmission.

FIG. 11 shows a diagram of a system 1100 including a device 1105 thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure. The device 1105 maybe an example of or include the components of device 805, device 905, ora UE 115 as described herein. The device 1105 may include components forbi-directional voice and data communications including components fortransmitting and receiving communications, including a communicationsmanager 1110, an I/O controller 1115, a transceiver 1120, an antenna1125, memory 1130, and a processor 1140. These components may be inelectronic communication via one or more buses (e.g., bus 1145).

The communications manager 1110 may identify a set of timing parametertables that each define one or more potential values for a timingparameter associated with a timing between receipt, from a base station,of DCI and subsequent communication with the base station, the set oftiming parameter tables including at least a first timing parametertable associated with a first BWP and a second timing parameter tableassociated with a second BWP. The communications manager 1110 mayreceive, over the first BWP, a DCI transmission that activates thesecond BWP, the DCI transmission including a resource allocation bitfield indexing at least a subset of the second timing parameter table,where a size of the resource allocation bit field is based on aconfiguration of the first BWP. The communications manager 1110 mayidentify a value for the timing parameter based on the second timingparameter table and the size of the resource allocation bit field. Thecommunications manager 1110 may communicate with the base station overthe second BWP in accordance with the value for the timing parameter.

The I/O controller 1115 may manage input and output signals for thedevice 1105. The I/O controller 1115 may also manage peripherals notintegrated into the device 1105. In some cases, the I/O controller 1115may represent a physical connection or port to an external peripheral.In some cases, the I/O controller 1115 may utilize an operating systemsuch as iOS®, ANDROID®, MS-DOS®, MS-WINDOWS®, OS/2®, UNIX®, LINUX®, oranother known operating system. In other cases, the I/O controller 1115may represent or interact with a modem, a keyboard, a mouse, atouchscreen, or a similar device. In some cases, the I/O controller 1115may be implemented as part of a processor. In some cases, a user mayinteract with the device 1105 via the I/O controller 1115 or viahardware components controlled by the I/O controller 1115.

The transceiver 1120 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1120 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1120 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas. In some cases, thewireless device may include a single antenna 1125. However, in somecases the device may have more than one antenna 1125, which may becapable of concurrently transmitting or receiving multiple wirelesstransmissions.

The memory 1130 may include RAM and ROM. The memory 1130 may storecomputer-readable, computer-executable code 1135 including instructionsthat, when executed, cause the processor to perform various functionsdescribed herein. In some cases, the memory 1130 may contain, amongother things, a BIOS which may control basic hardware or softwareoperation such as the interaction with peripheral components or devices.

The processor 1140 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1140 may be configured to operate a memoryarray using a memory controller. In other cases, a memory controller maybe integrated into the processor 1140. The processor 1140 may beconfigured to execute computer-readable instructions stored in a memory(e.g., the memory 1130) to cause the device 1105 to perform variousfunctions (e.g., functions or tasks supporting timing parametermanagement for bandwidth part switching).

The code 1135 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunication. The code 1135 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1135 may not be directly executable by theprocessor 1140 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 12 shows a block diagram 1200 of a device 1205 that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure. The device 1205 may be an example ofaspects of a base station 105 as described herein. The device 1205 mayinclude a receiver 1210, a communications manager 1215, and atransmitter 1220. The device 1205 may also include a processor. Each ofthese components may be in communication with one another (e.g., via oneor more buses).

The receiver 1210 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timingparameter management for bandwidth part switching, etc.). Informationmay be passed on to other components of the device 1205. The receiver1210 may be an example of aspects of the transceiver 1520 described withreference to FIG. 15. The receiver 1210 may utilize a single antenna ora set of antennas.

The communications manager 1215 may identify a set of timing parametertables that each define one or more potential values for a timingparameter associated with a timing between transmission, to a UE, of DCIand subsequent communication with the UE, the set of timing parametertables including at least a first timing parameter table associated witha first BWP and a second timing parameter table associated with a secondBWP. The communications manager 1215 may identify a trigger forswitching communications with the UE from the first BWP to the secondBWP. The communications manager 1215 may select a value for the timingparameter based on the trigger and the second timing parameter table.The communications manager 1215 may transmit, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indicating the value for thetiming parameter, where a size of the resource allocation bit field isbased on a configuration of the first BWP. The communications manager1215 may communicate with the UE over the second BWP in accordance withthe value for the timing parameter. The communications manager 1215 maybe an example of aspects of the communications manager 1510 describedherein.

The communications manager 1215, or its sub-components, may beimplemented in hardware, code (e.g., software or firmware) executed by aprocessor, or any combination thereof. If implemented in code executedby a processor, the functions of the communications manager 1215, or itssub-components may be executed by a general-purpose processor, a DSP, anASIC, a FPGA or other programmable logic device, discrete gate ortransistor logic, discrete hardware components, or any combinationthereof designed to perform the functions described in the presentdisclosure.

The communications manager 1215, or its sub-components, may bephysically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations by one or more physical components. In some examples, thecommunications manager 1215, or its sub-components, may be a separateand distinct component in accordance with various aspects of the presentdisclosure. In some examples, the communications manager 1215, or itssub-components, may be combined with one or more other hardwarecomponents, including but not limited to an input/output (I/O)component, a transceiver, a network server, another computing device,one or more other components described in the present disclosure, or acombination thereof in accordance with various aspects of the presentdisclosure.

The transmitter 1220 may transmit signals generated by other componentsof the device 1205. In some examples, the transmitter 1220 may becollocated with a receiver 1210 in a transceiver module. For example,the transmitter 1220 may be an example of aspects of the transceiver1520 described with reference to FIG. 15. The transmitter 1220 mayutilize a single antenna or a set of antennas.

FIG. 13 shows a block diagram 1300 of a device 1305 that supports timingparameter management for bandwidth part switching in accordance withaspects of the present disclosure. The device 1305 may be an example ofaspects of a device 1205 or a base station 115 as described herein. Thedevice 1305 may include a receiver 1310, a communications manager 1315,and a transmitter 1345. The device 1305 may also include a processor.Each of these components may be in communication with one another (e.g.,via one or more buses).

The receiver 1310 may receive information such as packets, user data, orcontrol information associated with various information channels (e.g.,control channels, data channels, and information related to timingparameter management for bandwidth part switching, etc.). Informationmay be passed on to other components of the device 1305. The receiver1310 may be an example of aspects of the transceiver 1520 described withreference to FIG. 15. The receiver 1310 may utilize a single antenna ora set of antennas.

The communications manager 1315 may be an example of aspects of thecommunications manager 1215 as described herein. The communicationsmanager 1315 may include a table controller 1320, a switching manager1325, a parameter controller 1330, a control manager 1335, and a datamanager 1340. The communications manager 1315 may be an example ofaspects of the communications manager 1510 described herein.

The table controller 1320 may identify a set of timing parameter tablesthat each define one or more potential values for a timing parameterassociated with a timing between transmission, to a UE, of DCI andsubsequent communication with the UE, the set of timing parameter tablesincluding at least a first timing parameter table associated with afirst BWP and a second timing parameter table associated with a secondBWP. The switching manager 1325 may identify a trigger for switchingcommunications with the UE from the first BWP to the second BWP. Theparameter controller 1330 may select a value for the timing parameterbased on the trigger and the second timing parameter table. The controlmanager 1335 may transmit, over the first BWP, a DCI transmission thatactivates the second BWP, the DCI transmission including a resourceallocation bit field indicating the value for the timing parameter,where a size of the resource allocation bit field is based on aconfiguration of the first BWP. The data manager 1340 may communicatewith the UE over the second BWP in accordance with the value for thetiming parameter.

The transmitter 1345 may transmit signals generated by other componentsof the device 1305. In some examples, the transmitter 1345 may becollocated with a receiver 1310 in a transceiver module. For example,the transmitter 1345 may be an example of aspects of the transceiver1520 described with reference to FIG. 15. The transmitter 1345 mayutilize a single antenna or a set of antennas.

FIG. 14 shows a block diagram 1400 of a communications manager 1405 thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure. The communicationsmanager 1405 may be an example of aspects of a communications manager1215, a communications manager 1315, or a communications manager 1510described herein. The communications manager 1405 may include a tablecontroller 1410, a switching manager 1415, a parameter controller 1420,a control manager 1425, and a data manager 1430. Each of these modulesmay communicate, directly or indirectly, with one another (e.g., via oneor more buses).

The table controller 1410 may identify a set of timing parameter tablesthat each define one or more potential values for a timing parameterassociated with a timing between transmission, to a UE, of DCI andsubsequent communication with the UE, the set of timing parameter tablesincluding at least a first timing parameter table associated with afirst BWP and a second timing parameter table associated with a secondBWP. In some examples, the table controller 1410 may transmit at leastone of the set of timing parameter tables to the UE via RRC signaling.In some cases, the first timing parameter table includes a first set ofrows and the second timing parameter table includes a second set ofrows, each row of the first set of rows and the second set of rowsindicating a potential value for the timing parameter. In some cases,the size of the resource allocation bit field is based on a number ofrows in the first set of rows. In some cases, the first timing parametertable is associated with uplink transmissions over the first BWP, andthe set of timing parameter tables further includes a third timingparameter table associated with downlink transmissions over the firstBWP. In some cases, the first BWP has a first tone spacing, and thesecond BWP has a second tone spacing. In some cases, the potentialvalues for the timing parameter of the first timing parameter table arebased on the first tone spacing, and the potential values for the timingparameter of the second timing parameter table are based on the secondtone spacing. In some cases, the first BWP is associated with a lowertransmission power than the second BWP.

The switching manager 1415 may identify a trigger for switchingcommunications with the UE from the first BWP to the second BWP. Theparameter controller 1420 may select a value for the timing parameterbased on the trigger and the second timing parameter table. In someexamples, the parameter controller 1420 may identify a subset of thesecond set of rows that are addressable by the resource allocation bitfield. In some examples, the parameter controller 1420 may select thevalue for the timing parameter based on the subset of the second set ofrows. In some cases, the subset of the second set of rows includes alowest-indexed row of the second set of rows, and the lowest-indexed rowcorresponds to a preferred value of the timing parameter for switchingto the second BWP. In some cases, the subset of the second set of rowsincludes a set of lowest-indexed rows of the second plurality of rows,the set of lowest-indexed rows corresponding to a set of values of thetiming parameter, where the values of the timing parameter are orderedfrom the largest value of the timing parameter to the smallest value ofthe timing parameter, for switching to the second BWP.

In some cases, the subset of the second set of rows includes at leastone row corresponding to a preferred value of the timing parameter forcommunicating in the second BWP. In some cases, the preferred value ofthe timing parameter includes a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.

The control manager 1425 may transmit, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indicating the value for thetiming parameter, where a size of the resource allocation bit field isbased on a configuration of the first BWP. In some examples, the controlmanager 1425 may zero-pad the resource allocation bit field. In someexamples, the control manager 1425 may identify a format for the DCItransmission based on the trigger. In some cases, the DCI transmissionincludes a BWP identification field that activates the second BWP.

The data manager 1430 may communicate with the UE over the second BWP inaccordance with the value for the timing parameter. In some examples,the data manager 1430 may transmit a PDSCH transmission. In someexamples, the data manager 1430 may receive a PUSCH transmission.

FIG. 15 shows a diagram of a system 1500 including a device 1505 thatsupports timing parameter management for bandwidth part switching inaccordance with aspects of the present disclosure. The device 1505 maybe an example of or include the components of device 1205, device 1305,or a base station 105 as described herein. The device 1505 may includecomponents for bi-directional voice and data communications includingcomponents for transmitting and receiving communications, including acommunications manager 1510, a network communications manager 1515, atransceiver 1520, an antenna 1525, memory 1530, a processor 1540, and aninter-station communications manager 1545. These components may be inelectronic communication via one or more buses (e.g., bus 1550).

The communications manager 1510 may identify a set of timing parametertables that each define one or more potential values for a timingparameter associated with a timing between transmission, to a UE, of DCIand subsequent communication with the UE, the set of timing parametertables including at least a first timing parameter table associated witha first BWP and a second timing parameter table associated with a secondBWP. The communications manager 1510 may identify a trigger forswitching communications with the UE from the first BWP to the secondBWP. The communications manager 1510 may select a value for the timingparameter based on the trigger and the second timing parameter table.The communications manager 1510 may transmit, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indicating the value for thetiming parameter, where a size of the resource allocation bit field isbased on a configuration of the first BWP. The communications manager1510 may communicate with the UE over the second BWP in accordance withthe value for the timing parameter.

The network communications manager 1515 may manage communications withthe core network (e.g., via one or more wired backhaul links). Forexample, the network communications manager 1515 may manage the transferof data communications for client devices, such as one or more UEs 115.

The transceiver 1520 may communicate bi-directionally, via one or moreantennas, wired, or wireless links as described above. For example, thetransceiver 1520 may represent a wireless transceiver and maycommunicate bi-directionally with another wireless transceiver. Thetransceiver 1520 may also include a modem to modulate the packets andprovide the modulated packets to the antennas for transmission, and todemodulate packets received from the antennas. In some cases, thewireless device may include a single antenna 1525. However, in somecases the device may have more than one antenna 1525, which may becapable of concurrently transmitting or receiving multiple wirelesstransmissions.

The memory 1530 may include RAM, ROM, or a combination thereof. Thememory 1530 may store computer-readable code 1535 including instructionsthat, when executed by a processor (e.g., the processor 1540) cause thedevice to perform various functions described herein. In some cases, thememory 1530 may contain, among other things, a BIOS which may controlbasic hardware or software operation such as the interaction withperipheral components or devices.

The processor 1540 may include an intelligent hardware device, (e.g., ageneral-purpose processor, a DSP, a CPU, a microcontroller, an ASIC, anFPGA, a programmable logic device, a discrete gate or transistor logiccomponent, a discrete hardware component, or any combination thereof).In some cases, the processor 1540 may be configured to operate a memoryarray using a memory controller. In some cases, a memory controller maybe integrated into processor 1540. The processor 1540 may be configuredto execute computer-readable instructions stored in a memory (e.g., thememory 1530) to cause the device to perform various functions (e.g.,functions or tasks supporting timing parameter management for bandwidthpart switching).

The inter-station communications manager 1545 may manage communicationswith other base station 105, and may include a controller or schedulerfor controlling communications with UEs 115 in cooperation with otherbase stations 105. For example, the inter-station communications manager1545 may coordinate scheduling for transmissions to UEs 115 for variousinterference mitigation techniques such as beamforming or jointtransmission. In some examples, the inter-station communications manager1545 may provide an X2 interface within an LTE/LTE-A wirelesscommunication network technology to provide communication between basestations 105.

The code 1535 may include instructions to implement aspects of thepresent disclosure, including instructions to support wirelesscommunication. The code 1535 may be stored in a non-transitorycomputer-readable medium such as system memory or other type of memory.In some cases, the code 1535 may not be directly executable by theprocessor 1540 but may cause a computer (e.g., when compiled andexecuted) to perform functions described herein.

FIG. 16 shows a flowchart illustrating a method 1600 that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure. The operations of method 1600may be implemented by a UE 115 or its components as described herein.For example, the operations of method 1600 may be performed by acommunications manager as described with reference to FIGS. 8 to 11. Insome examples, a UE may execute a set of instructions to control thefunctional elements of the UE to perform the functions described below.Additionally or alternatively, a UE may perform aspects of the functionsdescribed below using special-purpose hardware.

At 1605, the UE may identify a set of timing parameter tables that eachdefine one or more potential values for a timing parameter associatedwith a timing between receipt, from a base station, of DCI and asubsequent communication with the base station according to the DCI, theset of timing parameter tables including at least a first timingparameter table associated with a first BWP and a second timingparameter table associated with a second BWP. The operations of 1605 maybe performed according to the methods described herein. In someexamples, aspects of the operations of 1605 may be performed by a tablemanager as described with reference to FIGS. 8 to 11.

At 1610, the UE may receive, over the first BWP, a DCI transmission thatactivates the second BWP, the DCI transmission including a resourceallocation bit field indexing at least a subset of the second timingparameter table, where a size of the resource allocation bit field isbased on a configuration of the first BWP. The operations of 1610 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1610 may be performed by a control manageras described with reference to FIGS. 8 to 11.

At 1615, the UE may identify a value for the timing parameter based onthe second timing parameter table and the size of the resourceallocation bit field. The operations of 1615 may be performed accordingto the methods described herein. In some examples, aspects of theoperations of 1615 may be performed by a parameter manager as describedwith reference to FIGS. 8 to 11.

At 1620, the UE may communicate with the base station over the secondBWP in accordance with the value for the timing parameter. Theoperations of 1620 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1620 may beperformed by a data manager as described with reference to FIGS. 8 to11.

FIG. 17 shows a flowchart illustrating a method 1700 that supportstiming parameter management for bandwidth part switching in accordancewith aspects of the present disclosure. The operations of method 1700may be implemented by a base station 105 or its components as describedherein. For example, the operations of method 1700 may be performed by acommunications manager as described with reference to FIGS. 12 to 15. Insome examples, a base station may execute a set of instructions tocontrol the functional elements of the base station to perform thefunctions described below. Additionally or alternatively, a base stationmay perform aspects of the functions described below usingspecial-purpose hardware.

At 1705, the base station may identify a set of timing parameter tablesthat each define one or more potential values for a timing parameterassociated with a timing between transmission, to a UE, of DCI and asubsequent communication with the UE according to the DCI, the set oftiming parameter tables including at least a first timing parametertable associated with a first BWP and a second timing parameter tableassociated with a second BWP. The operations of 1705 may be performedaccording to the methods described herein. In some examples, aspects ofthe operations of 1705 may be performed by a table controller asdescribed with reference to FIGS. 12 to 15.

At 1710, the base station may select a value for the timing parameterbased on the second timing parameter table. The operations of 1710 maybe performed according to the methods described herein. In someexamples, aspects of the operations of 1710 may be performed by aparameter controller as described with reference to FIGS. 12 to 15.

At 1715, the base station may transmit, over the first BWP, a DCItransmission that activates the second BWP, the DCI transmissionincluding a resource allocation bit field indicating the value for thetiming parameter, where a size of the resource allocation bit field isbased on a configuration of the first BWP. The operations of 1715 may beperformed according to the methods described herein. In some examples,aspects of the operations of 1715 may be performed by a control manageras described with reference to FIGS. 12 to 15.

At 1720, the base station may communicate with the UE over the secondBWP in accordance with the value for the timing parameter. Theoperations of 1720 may be performed according to the methods describedherein. In some examples, aspects of the operations of 1720 may beperformed by a data manager as described with reference to FIGS. 12 to15.

It should be noted that the methods described above describe possibleimplementations, and that the operations and the steps may be rearrangedor otherwise modified and that other implementations are possible.Further, aspects from two or more of the methods may be combined.

Techniques described herein may be used for various wirelesscommunications systems such as code division multiple access (CDMA),time division multiple access (TDMA), frequency division multiple access(FDMA), orthogonal frequency division multiple access (OFDMA), singlecarrier frequency division multiple access (SC-FDMA), and other systems.A CDMA system may implement a radio technology such as CDMA2000,Universal Terrestrial Radio Access (UTRA), etc. CDMA2000 covers IS-2000,IS-95, and IS-856 standards. IS-2000 Releases may be commonly referredto as CDMA2000 1×, 1×, etc. IS-856 (TIA-856) is commonly referred to asCDMA2000 1×EV-DO, High Rate Packet Data (HRPD), etc. UTRA includesWideband CDMA (WCDMA) and other variants of CDMA. A TDMA system mayimplement a radio technology such as Global System for MobileCommunications (GSM).

An OFDMA system may implement a radio technology such as Ultra MobileBroadband (UMB), Evolved UTRA (E-UTRA), Institute of Electrical andElectronics Engineers (IEEE) 802.11 (Wi-Fi), IEEE 802.16 (WiMAX), IEEE802.20, Flash-OFDM, etc. UTRA and E-UTRA are part of Universal MobileTelecommunications System (UMTS). LTE, LTE-A, and LTE-A Pro are releasesof UMTS that use E-UTRA. UTRA, E-UTRA, UMTS, LTE, LTE-A, LTE-A Pro, NR,and GSM are described in documents from the organization named “3rdGeneration Partnership Project” (3GPP). CDMA2000 and UMB are describedin documents from an organization named “3rd Generation PartnershipProject 2” (3GPP2). The techniques described herein may be used for thesystems and radio technologies mentioned above as well as other systemsand radio technologies. While aspects of an LTE, LTE-A, LTE-A Pro, or NRsystem may be described for purposes of example, and LTE, LTE-A, LTE-APro, or NR terminology may be used in much of the description, thetechniques described herein are applicable beyond LTE, LTE-A, LTE-A Pro,or NR applications.

A macro cell generally covers a relatively large geographic area (e.g.,several kilometers in radius) and may allow unrestricted access by UEs115 with service subscriptions with the network provider. A small cellmay be associated with a lower-powered base station 105, as comparedwith a macro cell, and a small cell may operate in the same or different(e.g., licensed, unlicensed, etc.) frequency bands as macro cells. Smallcells may include pico cells, femto cells, and micro cells according tovarious examples. A pico cell, for example, may cover a small geographicarea and may allow unrestricted access by UEs 115 with servicesubscriptions with the network provider. A femto cell may also cover asmall geographic area (e.g., a home) and may provide restricted accessby UEs 115 having an association with the femto cell (e.g., UEs 115 in aclosed subscriber group (CSG), UEs 115 for users in the home, and thelike). An eNB for a macro cell may be referred to as a macro eNB. An eNBfor a small cell may be referred to as a small cell eNB, a pico eNB, afemto eNB, or a home eNB. An eNB may support one or multiple (e.g., two,three, four, and the like) cells, and may also support communicationsusing one or multiple component carriers.

The wireless communications system 100 or systems described herein maysupport synchronous or asynchronous operation. For synchronousoperation, the base stations 105 may have similar frame timing, andtransmissions from different base stations 105 may be approximatelyaligned in time. For asynchronous operation, the base stations 105 mayhave different frame timing, and transmissions from different basestations 105 may not be aligned in time. The techniques described hereinmay be used for either synchronous or asynchronous operations.

Information and signals described herein may be represented using any ofa variety of different technologies and techniques. For example, data,instructions, commands, information, signals, bits, symbols, and chipsthat may be referenced throughout the above description may berepresented by voltages, currents, electromagnetic waves, magneticfields or particles, optical fields or particles, or any combinationthereof.

The various illustrative blocks and modules described in connection withthe disclosure herein may be implemented or performed with ageneral-purpose processor, a digital signal processor (DSP), anapplication-specific integrated circuit (ASIC), a field-programmablegate array (FPGA) or other programmable logic device (PLD), discretegate or transistor logic, discrete hardware components, or anycombination thereof designed to perform the functions described herein.A general-purpose processor may be a microprocessor, but in thealternative, the processor may be any conventional processor,controller, microcontroller, or state machine. A processor may also beimplemented as a combination of computing devices (e.g., a combinationof a DSP and a microprocessor, multiple microprocessors, one or moremicroprocessors in conjunction with a DSP core, or any other suchconfiguration).

The functions described herein may be implemented in hardware, softwareexecuted by a processor, firmware, or any combination thereof. Ifimplemented in software executed by a processor, the functions may bestored on or transmitted over as one or more instructions or code on acomputer-readable medium. Other examples and implementations are withinthe scope of the disclosure and appended claims. For example, due to thenature of software, functions described above can be implemented usingsoftware executed by a processor, hardware, firmware, hardwiring, orcombinations of any of these. Features implementing functions may alsobe physically located at various positions, including being distributedsuch that portions of functions are implemented at different physicallocations.

Computer-readable media includes both non-transitory computer storagemedia and communication media including any medium that facilitatestransfer of a computer program from one place to another. Anon-transitory storage medium may be any available medium that can beaccessed by a general purpose or special purpose computer. By way ofexample, and not limitation, non-transitory computer-readable media mayinclude random-access memory (RAM), read-only memory (ROM), electricallyerasable programmable read only memory (EEPROM), flash memory, compactdisk (CD) ROM or other optical disk storage, magnetic disk storage orother magnetic storage devices, or any other non-transitory medium thatcan be used to carry or store desired program code means in the form ofinstructions or data structures and that can be accessed by ageneral-purpose or special-purpose computer, or a general-purpose orspecial-purpose processor. Also, any connection is properly termed acomputer-readable medium. For example, if the software is transmittedfrom a website, server, or other remote source using a coaxial cable,fiber optic cable, twisted pair, digital subscriber line (DSL), orwireless technologies such as infrared, radio, and microwave, then thecoaxial cable, fiber optic cable, twisted pair, DSL, or wirelesstechnologies such as infrared, radio, and microwave are included in thedefinition of medium. Disk and disc, as used herein, include CD, laserdisc, optical disc, digital versatile disc (DVD), floppy disk andBlu-ray disc where disks usually reproduce data magnetically, whilediscs reproduce data optically with lasers. Combinations of the aboveare also included within the scope of computer-readable media.

As used herein, including in the claims, “or” as used in a list of items(e.g., a list of items prefaced by a phrase such as “at least one of” or“one or more of”) indicates an inclusive list such that, for example, alist of at least one of A, B, or C means A or B or C or AB or AC or BCor ABC (e.g., A and B and C). Also, as used herein, the phrase “basedon” shall not be construed as a reference to a closed set of conditions.For example, an exemplary step that is described as “based on conditionA” may be based on both a condition A and a condition B withoutdeparting from the scope of the present disclosure. In other words, asused herein, the phrase “based on” shall be construed in the same manneras the phrase “based at least in part on.”

In the appended figures, similar components or features may have thesame reference label. Further, various components of the same type maybe distinguished by following the reference label by a dash and a secondlabel that distinguishes among the similar components. If just the firstreference label is used in the specification, the description isapplicable to any one of the similar components having the same firstreference label irrespective of the second reference label, or othersubsequent reference label.

The description set forth herein, in connection with the appendeddrawings, describes example configurations and does not represent allthe examples that may be implemented or that are within the scope of theclaims. The term “exemplary” used herein means “serving as an example,instance, or illustration,” and not “preferred” or “advantageous overother examples.” The detailed description includes specific details forthe purpose of providing an understanding of the described techniques.These techniques, however, may be practiced without these specificdetails. In some instances, well-known structures and devices are shownin block diagram form in order to avoid obscuring the concepts of thedescribed examples.

The description herein is provided to enable a person skilled in the artto make or use the disclosure. Various modifications to the disclosurewill be readily apparent to those skilled in the art, and the genericprinciples defined herein may be applied to other variations withoutdeparting from the scope of the disclosure. Thus, the disclosure is notlimited to the examples and designs described herein, but is to beaccorded the broadest scope consistent with the principles and novelfeatures disclosed herein.

What is claimed is:
 1. A method for wireless communication, comprising:identifying a plurality of timing parameter tables that each define oneor more potential values for a timing parameter associated with a timingbetween receipt, from a base station, of downlink control information(DCI) and a subsequent communication with the base station according tothe DCI, the plurality of timing parameter tables comprising at least afirst timing parameter table associated with a first bandwidth part(BWP) and a second timing parameter table associated with a second BWP,wherein the first timing parameter table comprises a first plurality ofrows and the second timing parameter table comprises a second pluralityof rows, each row of the first plurality of rows and the secondplurality of rows indicating a potential value for the timing parameter;receiving, over the first BWP, a DCI transmission that activates thesecond BWP, the DCI transmission comprising a resource allocation bitfield indexing at least a subset of the second timing parameter table,wherein a size of the resource allocation bit field is based at least inpart on a configuration of the first BWP; identifying a value for thetiming parameter based at least in part on the second timing parametertable and the size of the resource allocation bit field; andcommunicating with the base station over the second BWP in accordancewith the value for the timing parameter.
 2. The method of claim 1,wherein the size of the resource allocation bit field is based at leastin part on a number of rows in the first plurality of rows.
 3. Themethod of claim 1, wherein the first plurality of rows comprises morerows than the second plurality of rows, and wherein identifying thevalue for the timing parameter comprises: identifying a subset of bitsin the resource allocation bit field, the subset of bits indexing a rowof the second plurality of rows; and determining the value for thetiming parameter based on the indexed row of the second plurality ofrows.
 4. The method of claim 1, wherein the first plurality of rowscomprises fewer rows than the second plurality of rows, and whereinidentifying the value for the timing parameter comprises: identifying asubset of the second plurality of rows that are addressable by theresource allocation bit field; identifying a row of the subset of thesecond plurality of rows indexed by the resource allocation bit field;and determining the value for the timing parameter based on the indexedrow.
 5. The method of claim 4, wherein the subset of the secondplurality of rows comprises a lowest-indexed row of the second pluralityof rows, the lowest-indexed row corresponding to a preferred value ofthe timing parameter for switching to the second BWP.
 6. The method ofclaim 4, wherein the subset of the second plurality of rows comprises alargest value of the potential values for the timing parameter from thesecond plurality of rows.
 7. The method of claim 4, wherein the subsetof the second plurality of rows comprises at least one row correspondingto a preferred value of the timing parameter for communicating in thesecond BWP.
 8. The method of claim 7, wherein the preferred value of thetiming parameter comprises a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.
 9. The method of claim 1, wherein the first timingparameter table is associated with uplink transmissions over the firstBWP, the plurality of timing parameter tables further comprising a thirdtiming parameter table associated with downlink transmissions over thefirst BWP.
 10. The method of claim 1, wherein the first BWP has a firsttone spacing and the second BWP has a second tone spacing, and whereinthe potential values for the timing parameter of the first timingparameter table are based at least in part on the first tone spacing,and the potential values for the timing parameter of the second timingparameter table are based at least in part on the second tone spacing.11. The method of claim 1, further comprising: adjusting a minimum valueof the timing parameter, based at least in part on switchingcommunications from the first BWP to the second BWP.
 12. The method ofclaim 1, wherein identifying the plurality of timing parameter tablescomprises: receiving at least one of the plurality of timing parametertables from the base station via radio resource control (RRC) signaling.13. The method of claim 1, further comprising: identifying a format forthe DCI transmission; and selecting the second timing parameter tablefrom the plurality of timing parameter tables based at least in part onthe format of the DCI transmission.
 14. The method of claim 1, whereinthe DCI transmission comprises a BWP identification field that activatesthe second BWP.
 15. The method of claim 1, wherein the first BWP isassociated with a lower transmission power than the second BWP.
 16. Amethod for wireless communication, comprising: identifying a pluralityof timing parameter tables that each define one or more potential valuesfor a timing parameter associated with a timing between transmission, toa user equipment (UE), of downlink control information (DCI) and asubsequent communication with the UE according to the DCI, the pluralityof timing parameter tables comprising at least a first timing parametertable associated with a first bandwidth part (BWP) and a second timingparameter table associated with a second BWP, wherein the first timingparameter table comprises a first plurality of rows and the secondtiming parameter table comprises a second plurality of rows, each row ofthe first plurality of rows and the second plurality of rows indicatinga potential value for the timing parameter; selecting a value for thetiming parameter based at least in part on second timing parametertable; transmitting, over the first BWP, a DCI transmission thatactivates the second BWP, the DCI transmission comprising a resourceallocation bit field indicating the value for the timing parameter,wherein a size of the resource allocation bit field is based at least inpart on a configuration of the first BWP; and communicating with the UEover the second BWP in accordance with the value for the timingparameter.
 17. The method of claim 16, wherein the size of the resourceallocation bit field is based at least in part on a number of rows inthe first plurality of rows.
 18. The method of claim 16, wherein thefirst plurality of rows comprises more rows than the second plurality ofrows, and wherein transmitting the DCI transmission comprises:zero-padding the resource allocation bit field.
 19. The method of claim16, wherein the first plurality of rows comprises fewer rows than thesecond plurality of rows, and wherein selecting the value for the timingparameter comprises: identifying a subset of the second plurality ofrows that are addressable by the resource allocation bit field; andselecting the value for the timing parameter based at least in part onthe subset of the second plurality of rows.
 20. The method of claim 19,wherein the subset of the second plurality of rows comprises alowest-indexed row of the second plurality of rows, the lowest-indexedrow corresponding to a preferred value of the timing parameter forswitching to the second BWP.
 21. The method of claim 19, wherein thesubset of the second plurality of rows comprises a largest value of thepotential values for the timing parameter from the second plurality ofrows.
 22. The method of claim 19, wherein the subset of the secondplurality of rows comprises at least one row corresponding to apreferred value of the timing parameter for communicating in the secondBWP.
 23. The method of claim 22, wherein the preferred value of thetiming parameter comprises a first value for wakeup communications, asecond value for data communications, or a third value for micro-sleepcommunications.
 24. The method of claim 16, wherein the first timingparameter table is associated with uplink transmissions over the firstBWP, the plurality of timing parameter tables further comprising a thirdtiming parameter table associated with downlink transmissions over thefirst BWP.
 25. The method of claim 16, wherein the first BWP has a firsttone spacing and the second BWP has a second tone spacing, and whereinthe potential values for the timing parameter of the first timingparameter table are based at least in part on the first tone spacing,and the potential values for the timing parameter of the second timingparameter table are based at least in part on the second tone spacing.26. The method of claim 16, further comprising: adjusting a minimumvalue of the timing parameter, based at least in part on switchingcommunications from the first BWP to the second BWP.
 27. The method ofclaim 16, further comprising: transmitting at least one of the pluralityof timing parameter tables to the UE via radio resource control (RRC)signaling.
 28. The method of claim 16, further comprising: identifying atrigger for switching communications with the UE from the first BWP tothe second BWP; and identifying a format for the DCI transmission basedat least in part on the trigger.
 29. The method of claim 16, wherein theDCI transmission comprises a BWP identification field that activates thesecond BWP.
 30. The method of claim 16, wherein the first BWP isassociated with a lower transmission power than the second BWP.
 31. Anapparatus for wireless communication, comprising: a processor, memorycoupled with the processor; and instructions stored in the memory andexecutable by the processor to cause the apparatus to: identify aplurality of timing parameter tables that each define one or morepotential values for a timing parameter associated with a timing betweenreceipt, from a base station, of downlink control information (DCI) anda subsequent communication with the base station according to the DCI,the plurality of timing parameter tables comprising at least a firsttiming parameter table associated with a first bandwidth part (BWP) anda second timing parameter table associated with a second BWP, whereinthe first timing parameter table comprises a first plurality of rows andthe second timing parameter table comprises a second plurality of rows,each row of the first plurality of rows and the second plurality of rowsindicating a potential value for the timing parameter; receive, over thefirst BWP, a DCI transmission that activates the second BWP, the DCItransmission comprising a resource allocation bit field indexing atleast a subset of the second timing parameter table, wherein a size ofthe resource allocation bit field is based at least in part on aconfiguration the first BWP; identify a value for the timing parameterbased at least in part on the second timing parameter table and the sizeof the resource allocation bit field; and communicate with the basestation over the second BWP in accordance with the value for the timingparameter.
 32. The apparatus of claim 31, wherein the size of theresource allocation bit field is based at least in part on a number ofrows in the first plurality of rows.
 33. The apparatus of claim 31,wherein the first plurality of rows comprises more rows than the secondplurality of rows, and comprises: identify a subset of bits in theresource allocation bit field, the subset of bits indexing a row of thesecond plurality of rows; and determine the value for the timingparameter based on the indexed row of the second plurality of rows. 34.The apparatus of claim 31, wherein the first plurality of rows comprisesfewer rows than the second plurality of rows, and comprises: identify asubset of the second plurality of rows that are addressable by theresource allocation bit field; identify a row of the subset of thesecond plurality of rows indexed by the resource allocation bit field;and determine the value for the timing parameter based on the indexedrow.
 35. The apparatus of claim 34, wherein the subset of the secondplurality of rows comprises a lowest-indexed row of the second pluralityof rows, the lowest-indexed row corresponding to a preferred value ofthe timing parameter for switching to the second BWP.
 36. An apparatusfor wireless communication, comprising: a processor, memory coupled withthe processor; and instructions stored in the memory and executable bythe processor to cause the apparatus to: identify a plurality of timingparameter tables that each define one or more potential values for atiming parameter associated with a timing between transmission, to auser equipment (UE), of downlink control information (DCI) and asubsequent communication with the UE according to the DCI, the pluralityof timing parameter tables comprising at least a first timing parametertable associated with a first bandwidth part (BWP) and a second timingparameter table associated with a second BWP, wherein the first timingparameter table comprises a first plurality of rows and the secondtiming parameter table comprises a second plurality of rows, each row ofthe first plurality of rows and the second plurality of rows indicatinga potential value for the timing parameter; select a value for thetiming parameter based at least in part on the second timing parametertable; transmit, over the first BWP, a DCI transmission that activatesthe second BWP, the DCI transmission comprising a resource allocationbit field indicating the value for the timing parameter, wherein a sizeof the resource allocation bit field is based at least in part on aconfiguration of the first BWP; and communicate with the UE over thesecond BWP in accordance with the value for the timing parameter. 37.The apparatus of claim 36, wherein the size of the resource allocationbit field is based at least in part on a number of rows in the firstplurality of rows.
 38. The apparatus of claim 36, wherein the firstplurality of rows comprises more rows than the second plurality of rows,and comprises: zero-pad the resource allocation bit field.
 39. Theapparatus of claim 36, wherein the first plurality of rows comprisesfewer rows than the second plurality of rows, and comprises: identify asubset of the second plurality of rows that are addressable by theresource allocation bit field; and select the value for the timingparameter based at least in part on the subset of the second pluralityof rows.
 40. The apparatus of claim 39, wherein the subset of the secondplurality of rows comprises a lowest-indexed row of the second pluralityof rows, the lowest-indexed row corresponding to a preferred value ofthe timing parameter for switching to the second BWP.